240lw - barrett · the 240lw is a general-purpose machine gun capable of mounting on a bipod,...

240L

W240LW

OPERATOR’S MANUAL

TABLE OF CONTENTS USE OF THIS MANUAL

SAFETY GUIDELINES

WARRANTY AND SERVICE

DESCRIPTION OF FIREARM

SPECIFICATIONS

MAJOR COMPONENTS

SAFETY MECHANISM

BIPOD OPERATION

CARRY HANDLE OPERATION

SIGHTS

AMMUNITION

BLANK FIRING ATTACHMENT

LOADING PROCEDURES

OPERATION

UNLOADING AND CLEARING

DISASSEMBLY OF MAJOR COMPONENTS

INSPECTION

CLEANING AND LUBRICATION

GENERAL ASSEMBLY

FUNCTION CHECK

CYCLE OF OPERATION

MALFUNCTIONS

IMMEDIATE ACTION

REMEDIAL ACTION

EXPLODED VIEW AND PARTS LIST

2

2

4

5

5

6

6

7

8

9

12

13

13

15

17

18

25

28

32

38

39

41

44

46

48

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USE OF THIS MANUAL Read this manual before you use or manipulate your Barrett product. It is important that you understand the principles of safe gun handling in general and the features of this product. This manual is not a substitute for training from a qualified instructor. Important safety topics are discussed in this chapter and throughout this manual. This manual should remain with the product and it should be transferred with the product to subsequent owners. Additional manuals can be ordered from Barrett Firearms Manufacturing or can be downloaded from the company website, barrett.net. Technical specifications are subject to change without notice. Please ensure you have the most updated revision of this manual by checking barrett.net. The revision letter can be found on the back of this manual.

SAFETY GUIDELINES

FAILURE TO FOLLOW SAFETY GUIDELINES MAY CAUSE INJURY OR DEATH

AMMUNITIONDo not use hand loaded, re-manufactured, or surplus ammunition. Always use new, clean, dry, properly stored, and correct caliber ammunition from reputable manufacturers.

SAFETY DISTANCEBullets fired from this rifle may travel as far as 4 miles. Make certain that you have an adequate backstop.

HEARING PROTECTIONAlways wear adequate hearing protection when the rifle is firing; wear both earplugs and shooting muffs together for maximum protection. This includes observers. Observers should always be behind the shooter.

EYE PROTECTIONAppropriate eye protection should be worn when both shooting and maintaining your rifle. It is normal for firing to generate airborne dust and debris. Protect your eyes from solvents and uncaptured parts under spring pressure while performing maintenance on your rifle.

WARNING

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MUZZLE CONTROLAlways keep the muzzle pointed in a safe direction. Never allow your muzzle to point at anything that you do not intend to shoot. Upon firing the muzzle brake releases high-pressure gas from its side ports that can damage objects or cause injuries, keep everything away from the vicinity of the muzzle brake.

ASSUME EVERY GUN IS LOADED Always treat every gun as if it were loaded. Look and feel for an empty chamber. Do not trust the extractor to provide an empty chamber.

BEWARE OF BARREL OBSTRUCTIONSEnsure the barrel’s bore is free of obstructions before you fire your rifle. Even the smallest obstruction such as a stuck patch or even grease will cause increased pressures that can rupture the barrel.

KEEP YOUR FINGER OFF THE TRIGGERKeep your finger off the trigger and out of the trigger guard until your sights are aligned on your target and you intend to fire.

KEEP YOUR SAFETY ONKeep your safety on until your sights are aligned on your target and you intend to fire. Please note that the safety lever will not rotate into the “SAFE” position until the bolt is open or the action is cocked.

FAILURE TO FIREIf your rifle fails to fire when you pull the trigger, do not pull the charging handle. Keep the rifle pointed toward a safe area and wait 2 minutes. If a hang-fire (slow ignition) has occurred, the round will probably fire within two minutes. If the round does not fire, remove and inspect the cartridge. If the primer is indented properly, discard it in a safe manner.

MAINTAIN YOUR RIFLE PROPERLYPerforming proper maintenance, as outlined in this manual, insures that your rifle will be safe to shoot and will perform to design specification for many years. Alterations, modifications or

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adjustments may damage your rifle, make it unsafe to fire, and will void warranty claims.

STORE YOUR RIFLE SAFELYIt is your responsibility to take reasonable precaution to secure your rifle, keep it properly secured and prevent unauthorized use.

ALCOHOL, MEDICATIONS AND DRUGSDo not handle or operate your rifle under the influence of alcohol, medication, or drugs.

WARRANTY AND SERVICEFor one year from date of purchase, Barrett Firearms Manufacturing Inc. (BFMI), warrants to the original owner, that this product was manufactured free of defects in materials and workmanship. BFMI will correct any defect covered under the warranty by repair or replacement with the same or comparable model. BFMI will not be responsible for injury, death, or damage to property resulting from either intentional or accidental discharge of this firearm or from its function when used for purposes or subjected to treatment for which it was not designed. BFMI will not honor claims involving this product which result from careless or improper handling, unauthorized adjustment or parts replacement, corrosion, neglect, the use of the wrong caliber ammunition, or the use of other than commercially manufactured ammunition in good condition, or any combination thereof. Please visit barrett.net for any additional information.

If you need factory service, whether covered under warranty or not, please contact BFMI for instructions on how to have your rifle repaired.

Barrett Firearms Manufacturing Inc.P.O. Box 1077

Murfreesboro, TN 37133-1077615-896-2938

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DESCRIPTION OF FIREARMThe 240LW is a general-purpose machine gun capable of mounting on a bipod, tripod, aircraft, or vehicle. It is belt fed, air-cooled, gas operated, fully automatic and fires from an open bolt. The gas from firing one round provides the energy to fire the next one. Thus, the 240LW fires automatically as long as it has ammunition and the operator holds the trigger to the rear. As the gun fires, the links separate and eject from the side while empty cases eject from the bottom. Each 240LW is supplied with a spare barrel. The bore of the barrel is chromium plated to reduce wear.

Ammunition 7.62 x 51 mm ball, tracer, armor piercing, blank, dummy

Basic load (three-man crew) 900 to 1,200 roundsTracer burnout 900 metersLength (extended) 33 inches (838.2 mm) - 18.5 inch barrel

36 inches (304.8 mm) - 21.5 inch barrelWeight 19 lbs (9 kg) - 18.5 inch barrel

20 lbs (9.21 kg) - 21.5 inch barrelTwist rate 1 in 12” (304.8mm)Maximum range 3,725 metersMaximum effective range and T&E 1,100 meters with tripodArea bipod 800 metersPoint bipod 600 metersSuppression 1,800 metersMaximum range of grazing fire over level or uniformly sloping terrain

600 meters

Sustained rate of fire 100 rounds per minute, 6 - 9 round bursts, 4 - 5 seconds apart, barrel change every 10 minutes

Rapid rate of fire 200 rounds per minute, 10 - 13 round bursts, 2 - 3 minutes apart, barrel change every 2 minutes

Cyclic rate of fire 550 - 600 rounds per minute in continuous bursts, barrel change every minute

SPECIFICATIONS

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MAJOR COMPONENTS - FIGURE 11. Drive spring rod assembly2. Cover assembly3. Bolt and operating rod assembly4. Feed tray5. Barrel assembly6. Buttstock and hydraulic buffer assembly7. Receiver assembly8. Trigger housing and grip assembly9. Bipod assembly

1 2

3 4 5

6 7

8 9

FIGURE 1

SAFETY MECHANISMThe safety mechanism is located on side of the grip assembly. To place the gun in the safe mode, push the selector to the right until the letter “S” is visible. To place it in the fire mode, push the selector switch to the left until the letter “F” is visible. The safety can only engage the bolt in the rear position (FIGURE 2)

FIGURE 2

SAFETY

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BIPOD OPERATIONThe bipod assembly is used to fire from the prone position and control manipulation. The buttstock in conjunction with the operator’s non-firing hand provides support for the gun when firing in the bipod mode. The handguard holds the bipod in place.

DEPLOYING BIPOD• To lower the bipod legs, pull each bipod leg away from the yoke

(FIGURE 3-A) and rotate to the desired position (FIGURE 3-B). The bipod leg will lock into place (forward, rearward, and 90 degrees from the receiver). The bipod legs of the 240LW extend to increase height.

• To return the bipod to the locked upright position, depress the button for the bipod leg extension and press the bipod leg in then pull each bipod leg away from the yoke and rotate to the desired position.

FIGURE 3

REMOVING/INSTALLING BIPOD• To remove the bipod, push up on the bipod retention latch and

pull the bipod toward the muzzle (FIGURE 4).• To install the bipod, insert bipod yoke into the handguard until

the retention latch engages.

FIGURE 4

BIPOD RETENTION LATCH

B B

A

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CARRY HANDLE OPERATIONThe carry handle on the 240LW is designed to be adjustable to the operators situational requirements or preference.

BARREL CATCH - FIGURE 5Releasing the barrel catch allows the carry handle to pivot without disengaging the barrel from the receiver. Pull up on the barrel catch to allow the carry handle to pivot freely. This enables the use of optics or the factory iron sights without the carry handle interfering.

BARREL CATCH

FIGURE 5

HANDLE LOCK - FIGURE 6Releasing the handle lock enables the carry handle to rotate forward toward the muzzle. Push down on handle lock to allow it to pivot freely. In the forward position, larger optics can be mounted to the top cover without interference from the carry handle.

FIGURE 6

HANDLE LOCK

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SIGHTSThis section provides information on how to make sight corrections to zero the 240LW and make elevation/windage adjustments. Both the front and rear sights are adjustable for elevation and windage. The adjustments on the front sight are intended for zeroing the machine gun while the rear sight adjustments are intended for in the field elevation and windage correction (FIGURE 7).

FIGURE 7

ELEVATION ADJUSTMENT

WINDAGE ADJUSTMENT

REAR SIGHT FRONT SIGHT

ZEROING PROCEDURE - FRONT SIGHTSet the rear sight elevation to the correct distance the 240LW is being zeroed and the windage adjustments set at center. Recommended zeroing distance is 200 meters. Do not loosen the screw or adjust the elevation scale on the rear sight as this is set from the factory. With the rear sight set, adjust the front sight using a flat head screwdriver or similar tool to shift the point of impact (POI) to the desired location. To adjust only the elevation of the front sight, rotate the post by half or full turns (FIGURE 8). Reference the tables for POI shift per click or rotation of the sights. Repeat procedure for each barrel assembly.

FIGURE 8

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FRONT SIGHT - ONE FULL TURN MOVES POI UP OR DOWNRange Centimeters Inches

100 meters 11.4 4.50200 meters 22.9 9.00300 meters 34.3 13.50400 meters 45.7 18.00500 meters 57.2 22.50600 meters 68.6 27.00700 meters 80.0 31.50800 meters 91.4 36.00900 meters 102.9 40.50

FRONT SIGHT - ONE CLICK MOVES POI LEFT OR RIGHTRange Centimeters Inches


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ELEVATION/WINDAGE CORRECTION - REAR SIGHTWith the 240LW zeroed, the rear sight can be used for quick elevation and windage adjustments. Elevation adjustments performed made by rotating the elevation screw on the top of the rear sight body. For elevation adjustments, the elevation knob can be used to easily adjust POI to specific distances. Windage adjustments are performed by rotating the windage knob on the left side of the rear sight (FIGURE 8). When rotating the adjustment knobs audible clicks can be felt. The tables below display the POI shift at specific distances for each elevation and windage adjustment click.

REAR SIGHT - ONE CLICK MOVES POI UP OR DOWNRange Centimeters Inches


REAR SIGHT - ONE CLICK MOVES POI LEFT OR RIGHTRange Centimeters Inches


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AMMUNITIONThe 240LW machine gun uses several types of standard 7.62-mm ammunition. Ammunition for the 240LW is supplied in a disintegrating, metallic, split-linked belt (FIGURE 9).

FIGURE 9

BLANK FIRING ATTACHMENT (BFA)The BFA adapts to the 240LW machine gun for simulating live fire with blank cartridges where live firing is impractical or for training purposes.

FIGURE 10

INSTALLING THE BFA1. Unscrew the shaft until it slides all the way to the rear (FIGURE 10).

AVOID FIRING BLANK AMMUNITION AT ANYONE WITHIN 20 FEET OF YOU. AMMUNITION FRAGMENTS COULD CAUSE

INJURY OR DEATH.

WARNING

2. Install the BFA over the flash hider. Slide the shaft into the throat of the flash hider,engaging the threads on shaft into the body of the chamber device. Turn clockwise until hand tight (FIGURE 11).

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LOADING PROCEDURES1. Make sure the gun is clear and place the safety on “F”.2. With the palm of the hand facing up, pull the charging handle

to the rear to put the bolt assembly in the rear position (FIGURE 12)

PULL CHARGING HANDLE TO REAR

FIGURE 12

3. While the sear holds the bolt to the rear, manually return the charging handle to the forward position and place the safety on “S”.

4. Raise the cover assembly and ensure the feed tray, receiver assembly, and chamber are clear (FIGURE 13).

REMOVAL OF THE BFABreak any carbon sealed between the shaft and the muzzle brake by holding the barrel and rotating the body of the BFA about 180 degrees counterclockwise. Unscrew the shaft until the threads disengage, then remove the chamber device from the flash hider.

FIGURE 11

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7. Hold the belt about six rounds from the loading end, ensure that the round remains in the feed tray groove, and close the cover assembly.

8. Once the ammunition is loaded and the cover is closed, pull the charging handle to the rear to lock the bolt behind the sear. The firearm is now able to fire.

FIGURE 13

5. Lower the feed tray, place the safety on “F” and pull the charging handle to the rear. While maintaining rearward pressure on the charging handle, pull the trigger and ease the bolt assembly forward.

6. Place the first round of the belt in the feed tray groove with the open side of links face down (FIGURE 14).

FIGURE 14

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OPERATIONThe 240LW machine gun is loaded, fired, unloaded, and cleared from the open bolt position. The gun’s safety must first be placed on “F” before pulling the bolt to the rear. Ammunition should be free of dirt and corrosion. The 240LW machine gun’s high cyclic rate can quickly generate large amounts of heat. To prevent the degradation of the firearm’s accuracy and structural integrity, each firearm is provided with two barrels that can be quickly exchanged in the field. IT IS RECOMMENDED TO ROTATE BARRELS EVERY 200 ROUNDS.

ROTATING BARRELS

REMOVING BARREL1. With the barrel-carrying handle to the right side, depress and

hold the barrel-locking latch located on the left side of the receiver where the barrel joins the receiver. Grasp the carrying handle and rotate the carrying handle to the upright position (without pulling up on the barrel release) (FIGURE 15).

UNLESS DIRECT-SUPPORT PERSONNEL CERTIFY THE HEADSPACE, DO NOT SWAP BARRELS BETWEEN DIFFERENT

GUNS.

CAUTION

BARREL LOCKING-LATCH FIGURE 15

AFTER FIRING, BARREL WILL BE VERY HOT. USE THE PROVIDED BARREL MITT TO HANDLE HOT BARRELS.

WARNING

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2. Grab the handle, then push forward (FIGURE 16-A) and pull up (FIGURE 16-B), separating the barrel from the receiver.

INSTALLING BARRELWith the gas regulator downward and the carrying handle in the vertical position, place the second barrel on the barrel support located on the gas cylinder. Keeping the gun upright, pull the barrel to the rear, guiding the gas regulator into the gas cylinder. Pull the barrel fully into the receiver (FIGURE 17-A). With the barrel fully seated, rotate the carrying handle completely to the right, counting the number of clicks. If the number is between 2 to 7, the headspace is set correctly. If the number falls outside 2 to 7, ensure that the threads on the barrel are located on top and bottom and on the left and right on the inside of the receiver (FIGURE 17-B). If the issue persists, turn in the gun to the unit armorer.

FIGURE 16

A

B

FIGURE 17

AB 2-7 CLICKS

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UNLOADING AND CLEARING - FIGURE 181. If the bolt is in the forward position, keep the muzzle pointed

in a safe direction and move the safety to the fire “F” position.2. Pull the charging handle to the rear with your right hand facing

palm up, ensuring that the bolt locks to the rear.3. Return the charging handle to its forward position.4. Once the bolt is locked in the rearward position, engage the

safety by moving it to the “S” position.5. Raise the cover assembly and conduct the four-point safety

check for brass, links, or ammunition as follows:• Check the feed pawl assembly under the cover• Check the feed tray• Lift the feed tray and inspect the chamber• Check the space between the face of the bolt and chamber as

well as the space under the bolt and operating rod assembly6. Close the feed tray and cover assembly. Place the safety on

“F”. Pull and hold the charging handle to the rear, then pull the trigger allowing the bolt to slowly return forward to battery. Close the ejection port cover.

SAFETY

CHAMBER

FEED TRAY

COVER ASSEMBLY

CHARGING HANDLE

FIGURE 18

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DISASSEMBLY OF MAJOR COMPONENTSGeneral disassembly of the 240LW is performed by removing the eight major groups. First clear the gun and ensure the bolt is forward. Then each part can be placed on a clean, flat surface in the order in which they are removed.

ENSURE THE BOLT IS IN THE FORWARD POSITION BEFORE DISASSEMBLY. RETRACTING THE OPERATING ROD SPRING WITH THE BOLT TO THE REAR CAN CAUSE INJURY OR DEATH.

WARNING

REMOVAL OF TRIGGER HOUSING ASSEMBLY1. Push the end of the spring pin that is coming out of the left

side of the gun until it comes out the right side (FIGURE 19).

FIGURE 19

UNLOAD AND CLEAR THE RIFLE BEFORE DISASSEMBLYWARNING

EACH TIME YOU PULL THE BOLT TO THE REAR, RETURN THE CHARGING HANDLE TO THE FORWARD AND LOCKED POSITION.

FAILURE TO DO SO COULD RESULT IN DAMAGE TO THE GUN

CAUTION

2. Rotate the trigger-housing group assembly down, disengage the holding notch at the front of the assembly from the recess on the bottom of the receiver, and pull rearward to remove the assembly from the receiver (FIGURE 20).

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FIGURE 20

REMOVAL OF BUTTSTOCK AND BUFFER ASSEMBLY1. Depress and hold latch under the buttstock where it joins the

receiver (FIGURE 21).

LATCH

BUTTSTOCK AND BUFFER ASSEMBLY

FIGURE 21

2. Slide the buttstock upward until it stops, then remove rearward (FIGURE 22).

SLIDE UP THEN REARWARD

FIGURE 22

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REMOVAL OF THE DRIVE-SPRING ROD ASSEMBLY1. Push the end of the drive-spring rod assembly forward then

up to disengage its retaining stud from inside the receiver (FIGURE 23)

PUSH FORWARD THEN UP

FIGURE 23

2. Pull rearward on the drive spring rod assembly, removing it from the receiver (FIGURE 24).

DRIVE SPRING ROD ASSEMBLY

FIGURE 24

TO AVOID INJURY, KEEP YOUR BODY AWAY FROM THE REAR OF THE RECEIVER AND SECURELY HOLD THE ROD ASSEMBLY

AS IT IS UNDER TENSION.

WARNING

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REMOVAL OF BOLT AND OPERATING ROD ASSEMBLY1. Pull the charging handle to the rear to start the rearward

movement of the bolt and operating rod assembly inside of the receiver. Reach inside the top of the receiver and pull rearward on the face of the bolt until the bolt and operating rod assembly are exposed at the rear of the receiver (FIGURE 25).

2. Remove the bolt and operating rod from the rear of the receiver. Return the charging handle to the forward position.

NOTE: IF GRIP ASSEMBLY IS INSTALLED, PULL THE TRIGGER TO LOWER THE SEAR AND RELEASE THE BOLT

PRIOR TO PULLING THE CHARGING HANDLE WITH THE BUTTSTOCK REMOVED, ENSURE THE DRIVE SPRING

ASSEMBLY IS REMOVED

WARNING

BOLT ASSEMBLY

FIGURE 25

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REMOVAL OF COVER ASSEMBLY1. With the cover closed, remove the top cover pin (FIGURE 26).

2. Depress the cover latches, then lift up and remove the cover assembly (FIGURE 27).

3. Lift and remove the feed tray (FIGURE 28).

COVER LATCHES

FIGURE 27

FIGURE 28

FIGURE 26

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REMOVAL OF BARREL ASSEMBLY1. With the barrel-carrying handle to the right side, depress and

hold the barrel-locking latch located on the left side of the receiver where the barrel joins the receiver. Grasp the carrying handle and rotate the carrying handle to the upright position (without pulling up on the barrel release) (FIGURE 29).

BARREL LOCKING-LATCH FIGURE 29

2. Grab the handle, then push forward (FIGURE 30-A) and pull up (FIGURE 30-B), separating the barrel from the receiver.

FIGURE 30

A

B

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DISASSEMBLE THE BARREL ASSEMBLY1. Hold the barrel where the gas system attaches to it. Grasp and

rotate the gas collar counter clockwise until it releases and remove the collar from the gas plug (FIGURE 31).

FIGURE 31

2. Slide the gas regulator plug rearward, removing it from the gas block (FIGURE 32).

FIGURE 32

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INSPECTIONWith the 240LW disassembled into its eight major components each area of the gun and related equipment should be inspected. Shiny surfaces do not indicate that the gun is unserviceable. Any broken or missing parts should be repaired or replaced. Preventative Maintenance Checks and Services (PMCS) should be performed every 90 days, regardless if the gun has been used within that time.

If rust is found on a gun, PMCS should be performed immediately. All components should be inspected for broken or missing parts cracks, dents, burrs, excessive wear, rust, or corrosion. Check external surfaces for an adequate finish to prevent rust or corrosion.

BUTTSTOCK AND BUFFER ASSEMBLY• Check for burrs and rough edges on mating grooves and flanges.• Check buffer housing for peening, cracking or damage to

include finish missing from the stop above the buffer.• Check buffer shaft for bends, mushrooming, peening and

cracks on face.• Check to ensure the back plate latch locks the buffer assembly

securely to the receiver assembly when installed.• Ensure the hydraulic buffer sticks out through the back plate

and is flush or higher than the protrusion below it.• Check shaft for oil residue. Work the buffer assembly to check

for fluid leakage. Buffer shaft should depress smoothly without chatter and return promptly when released

• Ensure nothing rattles when the operator shakes the buffer, and that the plug cannot be rotated by finger pressure.

• Inspect the buttstock for cracks.• Ensure the back plate locks the buttstock securely to the

receiver assembly when installed.

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BARREL ASSEMBLY• Check the barrel for bulges, bends, burrs and obstructions or

pits in the chamber or bore.• Disassemble, inspect, and clean the gas collar and plug.• Ensure the flash suppressor is fastened securely. Inspect the

front sight for damage or looseness.• Inspect carrying handle assembly for bent, broken, or missing

parts.

DRIVE-SPRING ROD ASSEMBLY• Check the spring for broken strands. If two or more strands are

broken on the same coil or if there are three or more broken strands, then replace the spring.

• Ensure the drive-spring rod assembly is not bent.

BOLT AND OPERATING ROD ASSEMBLY• Inspect the entire area of the bolt and operating rod assembly

for missing parts, broken or cracked areas, burrs, bends, or pits on the surface.

• When looking at the bolt make sure the firing pin is not broken. The extractor should not move.

• The operating rod piston should have a slight movement from left to right (about 1/16-inch turn).

• When pulling the bolt and operating rod to the rear, the piston should move freely without binding

TRIGGER MECHANISM AND HOUSING ASSEMBLY• Inspect the tripping lever and sear for burrs on edges. Push

the tripping lever back to raise the sear, put the safety on “S” and then pull the trigger. The sear should not drop down far enough to lock in the downward position. Place the safety on “F”, and pull the trigger. The sear should drop down and lock in the downward position.

• Check the sear spring, ensuring the leg of the spring is behind

NOTE: IF DAMAGE IS FOUND ON THE BOLT ASSEMBLY, ALWAYS TURN IN BOTH BARRELS WITH THE GUN.

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the trigger pin and not between the trigger and the pin.• Check grip assembly for loose or missing grip screws.• Check trigger guard for bends or cracks.• Check trigger spring pin for bends, and or broken or missing

spring.

COVER ASSEMBLY AND FEED TRAY• Check that the rear sight assembly is securely mounted to the

top cover and operates properly.• Pivot the feed lever back and forth to ensure it operates

smoothly without binding. Push in on the cover latches to make sure the retaining clip is not weak or missing and that they do not bind in the housing.

• Push down on the cartridge guides and feed pawls to make sure the springs are not weak or missing. Inspect accessory mounting rail for nicks or burrs.

• Check the feed tray for cracks, deformations, or other damage.

RECEIVER ASSEMBLY• Check for proper charging handle operation by pulling it to the

rear and allowing it to slowly return forward, making sure that the slide does not bind in the receiver.

• Check for damaged or missing ejection port cover, spring, and pin.

• Lower and raise the bipod legs, ensuring they move freely without binding. Check bipod legs for cracks, or twisted or incomplete assembly.

• Check the exterior surface of the 240LW for the exterior protective finish.

• Ensure handguard is held tightly against the receiver and is not cracked, broken, or missing parts.

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ASSEMBLED MACHINE GUN• When installing the barrel, move the barrel release slowly to

the right and count the number of clicks. The barrel should lock tightly into place within two to seven clicks. Check both barrels.

• Check gun functioning with belted dummy ammunition by performing a function check. If the gun does not function properly and the cause cannot be determined using troubleshooting procedures, notify direct-support maintenance.

• Place safety to “F” fire. Pull charging handle completely rearward to lock bolt back. Return charging handle to forward, locked position.

• Place safety to “S” safe position, depress trigger, nothing should happen.

CARRYING CASE• Ensure that all maintenance tools and equipment are complete

and serviceable.

CLEANING AND LUBRICATIONThe 240LW machine gun should be cleaned immediately after firing.

After firing, and being cleared, the 240LW should be dissembled into its eight major assemblies and cleaned as soon as possible.

FOLLOW MANUFACTURER INSTRUCTIONS AND WARNINGS FOR ALL FIREARM CLEANING PRODUCTS.

CAUTION

UNLOAD AND CLEAR THE FIREARM BEFORE CLEANING.WARNING

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Clean the bore using a bore brush with a cleaning rod and CLP or Rifle Bore Cleaner (RBC). Do not reverse direction of the bore brush while it is in the bore.• Run the brush through the bore several times until most

of the powder fouling and other foreign matter has been re-moved.

• Swab out the bore several times using a cleaning rod and a swab wet with CLP.

• Swab out the bore several times using a cleaning rod and a dry swab.

Clean the chamber using CLP and a chamber brush attached to a cleaning rod.• Run the brush through the chamber several times until most

of the powder fouling and other foreign matter has been re-moved.

• Swab out the chamber several times using a cleaning rod and a swab wet with CLP.

• Swab out the chamber several times using a cleaning rod and a dry swab.

Clean the receiver using a receiver brush and CLP.• Brush the receiver until most of the powder fouling and

other foreign matter are removed.• Swab out the receiver several times using a swab wet with

CLP on a section of the cleaning rod.• Swab out the receiver several times using a dry swab on

a section of a cleaning rod.

Clean the gas regulator plug with the cleaning reamers and com-bination regulator scraper and remove all carbon dust. Do not use CLP on the collar, gas block, or body.

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Clean each gas inlet hole of the gas regulator plug by inserting the small reamer into each hole and twisting back and forth, with hand pressure only, to remove carbon (FIGURE 33-B).

Clean the central hole of the gas plug by inserting the gas plug scraper tool down to the bottom of the hole and twisting firmly (FIGURE 33-C).

Clean the two grooves by inserting the gas plug scraper tool into the grooves and applying pressure as firmly as possible (FIGURE 33-C).

Clean the gas cylinder with the gas cylinder scraper-extractor (FIGURE 33-A).

Clean the front interior of the gas cylinder by carefully inserting the gas cylinder scraper-extractor tool, with the handle upward. Be sure the tool is fully inserted and seated against the gas cylinder. Apply slight pressure to the handles and turn clockwise to remove carbon (FIGURE 33-A).

FIGURE 33

BEFORE USING THE SCRAPER-EXTRACTOR COMBINATION TOOL TO CLEAN THE GAS CYLINDER, SEAT THE TOOL FULLY AGAINST THE FORE-END OF THE CYLINDER. SCRAPING THE CYLINDER WITHOUT PLACING THE TOOL PRECISELY CAN DAMAGE THE

CYLINDER, CAUSING GAS LEAKS AND MALFUNCTIONS

CAUTION

BA C

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Clean gas cylinder bore with gas cylinder cleaning brush wet with CLP.

Brush the gas cylinder until you remove most of the powder fouling and other foreign matter.

Clean the bolt and operating rod with the scraper-extractor.

Clean the piston head cavity by inserting the operating rod cleaner tool into the piston bottom of the operating rod. Squeeze handles firmly and twist the tool to remove carbon• Insert the screwdriver end of the tool into the piston to remove

carbon residue on the bottom.• Clean the bolt and operating rod with rag and CLP.

Remember the following important points during cleaning:• Avoid using gasoline, kerosene, benzene, shaving cream, high-

pressure water, steam, or air for cleaning.• Keep the gas hole bushing free of CLP or RBC because it must

remain dry.• An improperly cleaned gas cylinder and gas regulator plug can

stick together during firing.

Lubricate the following parts with CLP as instructed:• Drive-spring rod assembly.• Bolt.• Receiver inner walls.• Cover assembly (springs, and feed pawls).• Trigger housing (inside only). After you lubricate the gun, cycle

the components by hand to spread the CLP. If you fire a gun infrequently or store it for prolonged periods, keep a light film of CLP on it. Apply it to the inside of the gas cylinder and to the gas piston right after you clean or inspect the gun. Do preventive maintenance every 90 days, unless your inspection reveals a need for more frequent servicing. Even when you keep a gun lubricated, you must still clean and inspect it for corrosion. Before you use the gun, clean the gas system and components, and ensure they are free of oil and lubricants.

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In unusual conditions, clean and lubricate the 240LW as follows:• Below 0 degrees Fahrenheit—use lubricating oil, arctic weather

(LAW). Oil lightly to avoid freeze-up.• Extreme heat—use light coat of CLP.• Damp or salty air—use CLP. Clean and apply frequently.• Sandy or dusty areas—use CLP. Clean and apply frequently,

and wipe with a clean rag after each application to remove any excess so as not to attract dirt and debris.

GENERAL ASSEMBLYAfter cleaning, lubricating, and inspecting the gun, it can be reassembled and a function check should be performed.

ASSEMBLY OF THE BARREL COMPONENTS1. The gas-regulator plug has three gas inlet setting to maintain

the rate of fire. Setting 1 is for approximately 600 rds/m, setting 2 is for approximately 625 rds/m and setting 3 is for approximately 650 rds/m. This design is intended to maintain a constant rate of fire under adverse conditions and NOT TO INCREASE RATE OF FIRE. Insert the gas-regulator plug into the rear of the gas hole bushing so that it is on the necessary gas setting. The gas port setting number on the regulator should be facing the barrel. (FIGURE 34).

FIGURE 34

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33

2. Place the gas collar over the front end of the gas regulator plug. Push the collar against the spring and rotate the collar counterclockwise until it stops (FIGURE 35).

3. With the gas regulator downward and the carrying handle in the vertical position, place the barrel on the barrel support located on the gas cylinder. Keeping the gun upright, pull the barrel to the rear, guiding the gas regulator into the gas cylinder. Pull the barrel fully into the receiver (FIGURE 36).

4. With the barrel fully seated, rotate the carrying handle com-pletely to the right, counting the number of clicks. If the num-ber is between 2 to 7, the headspace is set correctly. If the num-ber falls outside 2 to 7, ensure that the threads on the barrel are located on top and bottom and on the left and right on the inside of the receiver. If the issue persists, turn in the gun to the unit armorer.

FIGURE 35

AB

FIGURE 36

2-7 CLICKS

240LW

34

ASSEMBLY OF THE COVER AND FEED TRAY1. Place the feed tray onto the receiver; aligning its mounting

holes with the mounting brackets on the receiver (FIGURE 37).

2. Place the cover assembly onto the receiver; aligning its mounting holes with the mounting brackets on the receiver (FIGURE 38).

3. Insert the top cover pin into the holes push through to affix the cover and feed tray to the receiver (FIGURE 38).

FIGURE 37

FIGURE 38

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35

ASSEMBLY OF THE BOLT AND OPERATING ROD1. Ensure that the bolt and operating rod are fully extended to

the unlocked position (FIGURE 39).

2. Insert the bolt and operating rod into the rear of the receiver with the bolt facing upward. Ensure the bolt is on top of the rails located on the inner walls of the receiver and push it in as far forward as possible (FIGURE 40).

NOTE: IF GRIP ASSEMBLY IS INSTALLED, PULL THE TRIGGER TO LOWER THE SEAR AND INSERT THE BOLT

LOCKED

UNLOCKED FIGURE 39

FIGURE 40

RAILS

240LW

36

ASSEMBLY OF THE DRIVE SPRING ROD ASSEMBLY1. Insert the drive spring rod assembly into the receiver and slide

it all the way forward against the recess in the rear of the operating rod (FIGURE 41).

DRIVE SPRING ROD ASSEMBLY

FIGURE 41

2. Push forward then down on the end of the drive spring rod assembly to engage the retaining stud into the hole located on the bottom of the receiver (FIGURE 42).

PUSH FORWARD THEN DOWN

FIGURE 42

TO AVOID INJURY, KEEP YOUR BODY AWAY FROM THE REAR OF THE RECEIVER AND SECURELY HOLD THE ROD ASSEMBLY

AS IT IS UNDER TENSION.

WARNING

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ASSEMBLY OF THE BUTTSTOCK AND BUFFER ASSEMBLYPosition the bottom recess grooves of the buttstock onto the top of the receiver recess grooves then slide the buttstock down until it locks in place on the receiver (FIGURE 43).

SLIDE DOWNWARD

FIGURE 43

ASSEMBLY OF THE TRIGGER HOUSING ASSEMBLY1. Insert the holding notch on the front of the trigger housing into

the forward recess on the bottom of the receiver. Then rotate the rear of the trigger housing upwards and align the holes of the trigger housing with the mounting bracket on the receiver (FIGURE 44).

FIGURE 44

2. Hold the trigger housing assembly and insert the spring of the spring pin into the hole on the right then push it though, securing the assembly to the receiver (FIGURE 45).

240LW

38

FIGURE 45

FUNCTION CHECKPerform a function check to ensure the 240LW was correctly assembled by executing the following steps in order:1. Place the safety on “F.”2. Pull the charging handle to the rear, locking the bolt to the

rear of the receiver.3. Return the charging handle to the forward position.4. Place the safety on “S” and close the cover.5. Pull the trigger. (Bolt should NOT go forward).6. Place the safety on “F.”7. Pull the charging handle to the rear, pull the trigger, and slide

the bolt forward while maintaining positive control with your hand so it does not slam into place.

8. Close the ejection port cover.

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39

CYCLE OF OPERATIONKnowing how the gun function is imperative to recognizing and correcting stoppages. The gun functions automatically as long as ammunition is fed into it and the trigger is held to the rear. Each time the operator fires a round, parts of the gun function in a cycle or sequence. Many of the actions occur at the same time. This sequence is called the “cycle of operation,” which starts when the first round of the belt is placed in the tray groove. The trigger is then pulled, releasing the sear from the sear notch. When the trigger is pulled, the back of the sear lowers and disengages from the sear notch. This allows the expansion of the drive-spring rod assembly to drive the bolt and operating rod assembly forward. The cycle stops when the trigger is released and the sear again engages the sear notch on the bolt and operating rod assembly.

FEEDINGThe trigger is pulled to the rear lowering the sear allowing the bolt and operating rod assembly to move forward. The bolt strips the first round and the cartridge guides guide the round forward and prevent the forward movement of the link. The bolt assembly roller moves the feed lever causing the feed pawls to begin feeding the next round. The bolt feeds a round into the barrel. As the bolt assembly moves rearward, the feed lever moves to the right. The feed pawls move the next round into position against the cartridge stop.

CHAMBERINGThe bolt pushes the round into the chamber and sits firmly against the barrel, completing chambering.

LOCKINGThe operating rod continues pushing forward after the bolt seats against the barrel forcing the locking lever down, locking it against the recoil shoulder.

240LW

40

FIRINGThe firing pin moves through the bolt and strikes the primer of the cartridge.

UNLOCKINGGas from the fired round enters the gas chamber through the gas regulator forcing the operating rod rearward. The operating rod pulls back on the locking lever, unlocking the bolt.

EXTRACTINGThe extractor holds the cartridge against the breech face as the operating rod unlocks and moves the bolt rearward.

EJECTINGThe ejector pushes the spent round through the ejection port.

COCKINGGas from the fired round enters the gas port bushing, traveling through the gas regulator and then entering the piston cup at the end of the operating rod. The gas then forces the operating rod rearward compressing the drive spring. The bolt assembly moves the feed lever causing the feed pawls to move the next round into position. The Trigger tripping lever moves up when the trigger is released. The operating rod assembly trips the trigger tripping lever releasing the sear. The operating rod assembly engages the sear and prevents the firearm from firing if the trigger has been released. Cocking completes once the bolt is far enough to the rear to pick up the next round.

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MALFUNCTIONSA malfunction occurs when a mechanical failure causes the gun to fire improperly. Defective ammunition or improper operation by the operator is not considered a malfunction. Sluggish operation and uncontrolled fire are the most common malfunction. If cleaning and lubricating the gun fails to fix the problem, then the operator turns it in to the unit armorer.

UNCONTROLLED FIREUncontrolled fire (the gun continues to fire after the operator releases the trigger). This is usually caused by the operator’s failure to pull and hold the trigger all the way to the rear. The following are immediate actions for uncontrolled fire:• The operator holds the gun on target and fires the remaining

ammunition (50 rounds or less)• The assistant operator stops the gun from firing by breaking

the belt of ammunition or twisting the links (more than 50 rounds)

STUCK CASINGSwelling of the cartidge occurs when firing. If the swelling is excessive, the cartridge will be fixed tightly in the chamber and may not be extracted by the extractor. Once the bolt is locked to the rear:1. Place the safety in the “Safe” position.2. Keep the firearm pointing in a safe direction and allow the

barrel to cool, especially if just shooting 200 or more rounds consecutively (see “Cook Off” warning on page 46).

3. Once the barrel is cool, remove it from the firearm and insert a cleaning rod into the muzzle to push out the round through the chamber.

240LW

42

FIGURE 46

RUPTURED CARTRIDGEAfter a cartridge is fired it may be left in a structurally weakened state and may swell (see Stuck Casing). A properly functioning extractor may sometimes tear off the base of the cartridge as the bolt moves to the rear, leaving the rest of the cartridge wedged inside the chamber. Use the ruptured cartridge tool (FIGURE 46) to remove the ruptured cartridge using the following process:1. Remove the barrel2. Insert the extractor into the chamber where it can grip and

remove the remains of the cartridge.

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MALFUNCTION PROBABLE CAUSE CORRECTIVE ACTION

FAILURE TO FEED

Insufficient gas pressure Clean gas port, inserts, and gas plug

Improper lubrication Remove excess lubrication/apply to needed areas

Defective links or ammunition

Replace links or ammunition

Ammunition belt installed wrong

Clear firearm then reinstall correctly

Damaged or weak feed pawls and springs or feed lever

Send to maintenance

Damaged or weak springs or feed leverObstruction in receiver Clear firearm then remove

obstruction

FAILURE TO CHAMBER

Ruptured cartridge case Remove using ruptured cartridge case removal tool

Damaged drive-spring rod assembly

Replace drive-spring rod assembly

Damaged gas plug or collar (cracks or burrs)

Replace gas plug/collar

Built-up carbon on gas plug or collar, gas cylinder, or piston; or dirty chamber

Remove carbon and clean

FAILURE TO EXTRACT

Broken extractor or spring Replace

Chipped or broken extractorDefective extractor plungerInsufficient gas pressure Clean and lubricate as

required

FAILURE TO LOCK

Dirty chamber Clean

Dirty receiver or lack of lubrication

Clean and lubricate

Insufficient gas pressure Clean gas regulator

240LW

44

MALFUNCTION PROBABLE CAUSE CORRECTIVE ACTION

FAILURE TO FIRE

Faulty ammunition ReplaceBroken or damaged firing pin or defective trigger

Send to maintenance

Insufficient gas pressure Clean gas port, inserts, and gas plug

FAILURE TO COCK

Broken sear Send to maintenanceWorn operating rod sear notchBroken, defective, or missing sear plunger and or spring

SHORT RECOIL

NA Clean gas port and operating rod tube. Lubricate as required. Replace operating rod spring. See runaway gun (MALFUNCTIONS)

IMMEDIATE ACTIONThe operator takes immediate action to reduce a stoppage without seeking the cause. For example, the operator conducts immediate action when a misfire or cook off occurs. The operator keeps the gun on his shoulder while performing immediate action procedures. If the gun stops firing, take the following immediate actions.

DEFINITIONS• A misfire is the failure of a chambered round to fire. Such

failure can be due to an ammunition defect or faulty firing mechanism.

• A cook off is the firing of a round due to the heat of a hot barrel and not to the firing mechanism. Cook offs can be avoided by applying immediate action within 10 seconds of a failure to fire.

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45

A “HOT” GUN, THAT HAS JUST FIRED 200 OR MORE SUCCESSIVE ROUNDS, CAN “COOK OFF” A ROUND WITHOUT ANY ACTION BY THE OPERATOR.

IF A “HOT” GUN FAILS TO FIRE, AND YOU MUST CLEAR IT WHILE THE BARREL IS STILL HOT BY:1. KEEPING THE COVER CLOSED, PLACE THE GUN ON SAFE

(NO RED SHOWING) AND KEEP IT POINTING DOWN-RANGE.

2. BEFORE CLEARING AND APPLYING IMMEDIATE OR RE-MEDIAL ACTION, YOU MUST FIRST WAIT:• TRAINING SITUATIONS: 15 MINUTES.• TACTICAL SITUATIONS: 5 SECONDS.

WARNING

An effective memory aid is POPP, which stands for pull, observe, push, and press:1. Pull and lock the charging handle to the rear while you2. Observe the ejection port to see if a cartridge case, belt link, or round

ejects. Ensure that the bolt remains to the rear to prevent double feeding if a round or cartridge case is not ejected. If a cartridge case, belt link, or round ejects

3. Push the charging handle to its forward position, take aim on the target,

4. Press the trigger. If the gun does not fire, take remedial action. If a cartridge case, belt link, or round fails to eject, take remedial action.

NOTE: WHEN APPLYING IMMEDIATE OR REMEDIAL ACTION ON A COLD OR HOT GUN, CHECK TO SEE IF ANY PART OF THE ROUND (RANGING FROM THE TIP OF THE BULLET TO THE RIM) IS IN THE CHAMBER. REMOVE THE AMMUNITION FROM THE FEED TRAY ONLY, THEN CLOSE THE COVER AND TRY TO FIRE. IF THE GUN FIRES, RELOAD AND CONTINUE FIRING. IF IT DOES NOT FIRE, THEN CLEAR THE GUN AND

INSPECT THE GUN AND AMMUNITION.

240LW

46

REMEDIAL ACTIONRemedial action is any action taken to determine the cause of a stoppage and to restore the gun to an operational condition. Do this only if immediate action fails to fix the problem.• In a training situation, after completing the remedial action

procedures do not fire the gun until an ordnance specialist has inspected it.

• In a combat situation, after you have corrected the stoppage, change the barrel and try to fire. If the gun fails to function properly, send it to the unit armorer.

COLD GUN PROCEDUREWhen a stoppage occurs with a cold gun and immediate action has failed, the operator must:1. Pull the charging handle to the rear, locking the bolt. Return the

charging handle and place the safety to SAFE.2. Place the gun on the ground, pointing down range, away from the

operators face and open the cover. Perform the four- point safety check then reload and continue to fire.

3. If the gun fails to fire, clear the gun and inspect it and the ammunition.

HOT GUN PROCEDUREIf the stoppage occurs with a hot gun (200 rounds or more in 2 minutes or as noted above for training), the operator moves the safety to SAFE, waits 5 seconds (during training, lets the gun cool for 15 minutes), uses the same procedures as outlined for cold gun procedures.

JAMMED CHARGING HANDLEIf a stoppage occurs and the operator cannot pull the charging handle to the rear by hand (the bolt might be fully forward and locked, or only partially forward), do not force the charging handle to the rear. The operator must:1. Try again to pull the charging handle by hand.2. If the gun is hot enough to cause a cook off, move everyone a safe

distance from the gun and keep them away for 15 minutes.3. After the gun has cooled, carefully remove buttstock then the drive-

spring rod assembly. Open the cover and disassemble the gun (an assistant operator can help with this).

4. Remove the round or fired cartridge. Uses cleaning rod or ruptured cartridge extractor if necessary.

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NOTES

240LW

48

EXPLODED VIEW AND PARTS LIST

64

73

93

71 72

123

70

74

129

69

75

65

68

1966

67

133

132

131

94

125

134

127

126

63

98

109

54

130

9796

95

20

62

117

119

118

128

60

59

61

111 58110

112

56

101

57

48

55

86

100

53

108107

52

106

50

49

46

123

99

47

87

51

36

35

39

91

33

105

37

114

90

34

38

40

89

45

32

115

18

44

43

85

88

17

42

104

84

81

41

16

121

29

120

19

82

83

28

13

80

15

27

21

14

10

22

12

23

92

24

4

78

116

30

3

79113

88

77

25

3

102

86

77

26

9

122

31

7

8

76

1

124

116

103

2

5

64

73

93

71 72

123

70

74

129

69

75

65

68

1966

67

133

132

131

94

125

134

127

126

63

98

109

54

130

9796

95

20

62

117

119

118

128

60

59

61

111 58110

112

56

101

57

48

55

86

100

53

108107

52

106

50

49

46

123

99

47

87

51

36

35

39

91

33

105

37

114

90

34

38

40

89

45

32

115

18

44

43

85

88

17

42

104

84

81

41

16

121

29

120

19

82

83

28

13

80

15

27

21

14

10

22

12

23

92

24

4

78

116

30

3

79113

88

77

25

3

102

86

77

26

9

122

31

7

8

76

1

124

116

103

2

5

barrett.net

49

64

73

93

71 72

123

70

74

129

69

75

65

68

1966

67

133

132

131

94

125

134

127

126

63

98

109

54

130

9796

95

20

62

117

119

118

128

60

59

61

111 58110

112

56

101

57

48

55

86

100

53

108107

52

106

50

49

46

123

99

47

87

51

36

35

39

91

33

105

37

114

90

34

38

40

89

45

32

115

18

44

43

85

88

17

42

104

84

81

41

16

121

29

120

19

82

83

28

13

80

15

27

21

14

10

22

12

23

92

24

4

78

116

30

3

79113

88

77

25

3

102

86

77

26

9

122

31

7

8

76

1

124

116

103

2

5

64

73

93

71 72

123

70

74

129

69

75

65

68

1966

67

133

132

131

94

125

134

127

126

63

98

109

54

130

9796

95

20

62

117

119

118

128

60

59

61

111 58110

112

56

101

57

48

55

86

100

53

108107

52

106

50

49

46

123

99

47

87

51

36

35

39

91

33

105

37

114

90

34

38

40

89

45

32

115

18

44

43

85

88

17

42

104

84

81

41

16

121

29

120

19

82

83

28

13

80

15

27

21

14

10

22

12

23

92

24

4

78

116

30

3

79113

88

77

25

3

102

86

77

26

9

122

31

7

8

76

1

124

116

103

2

5

240LW

50

ITEM

N

O.DE

SCRI

PTIO

NQT

Y.IT

EM

NO.

DESC

RIPT

ION

QTY.

ITEM

N

O.DE

SCRI

PTIO

NQT

Y.

1DR

IVE

SPR

ING

ROD

ASSE

MBL

Y1

46FE

ED T

RAY

191

BUTT

STO

CK L

ATCH

SPR

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1

2OP

ERAT

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ROD

ASSE

MBL

Y1

47EX

TER

NAL

RET

AIN

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RIN

G1

92LA

TCH

STO

P SP

RIN

G PI

N1

3CH

ARGI

NG

HAN

DLE

PIN

148

BELT

RET

AIN

ER P

IN1

93 G

RIP

SCR

EW2

4SP

RIN

G PI

N1

49BE

LT R

ETAI

NER

SPR

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194

LEF

T GR

IP1

5FI

RIN

G PI

N1

50BE

LT R

ETAI

NER

195

SAFE

TY A

SSEM

BLY

1

6RO

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BEA

RIN

G

151

HAN

DLE

SPIN

DLE

196

SEA

R/S

PRIN

G PI

N2

7RO

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BEA

RIN

G SP

RIN

G1

52CA

RRY

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HAN

DLE

197

TRIG

GER

PIN

1

8RO

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BEA

RIN

G AS

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BLY

153

SPIN

DLE

PIN

198

TRIG

GER

GUA

RD

PIN

1

9BO

LT A

SSEM

BLY,

STR

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D1

54H

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N1

99TR

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R A

SSEM

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10EJ

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PIN

155

HAN

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100

TRIG

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56H

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110

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158

BAR

REL

ADA

PTER

110

3 T

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SERT

2

14EX

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TOR

SPR

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159

ROLL

PIN

110

4TR

IGGE

R R

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TIO

N P

IN1

15EX

TRAC

TOR

PLU

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60H

ANDL

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CK1

105

LOW

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VER

ASS

EMBL

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16R

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SIG

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BASE

161

CAT

CH S

PRIN

G1

106

DETE

NT

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17W

INDA

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PIN

162

BAR

REL

CAT

CH B

RAC

KET

110

7DE

TEN

T PL

UN

GER

SPR

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2

18W

INDA

GE K

NOB

163

BAR

REL

COM

PLET

E1

108

DETE

NT

PLU

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R S

PRIN

G DI

VIDE

R1

19FR

ONT/

REA

R S

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T PL

UN

GER

SP

RIN

G2

64FR

ONT

SIGH

T RO

LL P

IN1

109

DETE

NT

PLU

NGE

R R

ETA

ININ

G PI

N1

20R

EAR

SIG

HT

SCAL

E SC

REW

165

FRON

T SI

GHT

SET

SCR

EW1

110

BAR

REL

LAT

CH P

IN1

21R

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SIG

HT

SCAL

E1

66SI

GHT

ADJU

STM

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SPR

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111

1BA

RR

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ATCH

1

22R

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SIG

HT

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ONT

SIGH

T PO

ST1

112

BAR

REL

LAT

CH S

PRIN

G A

SSEM

BLY

1

23EL

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ION

SCR

EW P

IN1

68SP

RIN

G PL

UN

GER

111

3CH

ARG

ER B

ODY

1

24EL

EVAT

ION

SCR

EW1

69FR

ONT

SIGH

T BO

DY1

114

CHA

RGER

DET

ENT

1

25EL

EVAT

ION

SCR

EW S

PRIN

G1

70GA

S BL

OCK

LOCK

ING

TAB

111

5CH

ARG

ER D

ETEN

T SP

RIN

G1

26EL

EVAT

ION

SCR

EW B

ALL

171

GAS

BLOC

K N

UT

111

6CH

ARG

ER H

AN

DLE

1

27 R

EAR

SIG

HT

BODY

172

FLAS

H H

IDER

111

7 E

JECT

ION

PO

RT C

OVER

HIN

GE

PIN

1

28R

EAR

SIG

HT

BASE

DET

ENT

PLU

NGE

R1

73GA

S CO

LLAR

ASS

EMBL

Y1

118

EJEC

TIO

N P

ORT

COV

ER1

29R

EAR

SIG

HT

BASE

SCR

EW2

74GA

S BL

OCK

111

9EJ

ECTI

ON

PO

RT S

PRIN

G1

30W

INDA

GE S

CREW

SPR

ING

175

GAS

PLU

G1

120

SLOT

TED

SPR

ING

PIN

1

31W

INDA

GE S

CREW

176

CURV

ED B

UTT

PLAT

E1

121

CHA

RGER

DET

ENT

PIN

1

32TO

P CO

VER

ASS

EMBL

Y1

77BU

TTPL

ATE

LOCK

ROD

212

2CH

ARG

ER S

TRA

IGH

T PI

N1

33PA

WL

RET

AIN

ING

PIN

178

RET

AIN

ING

RIN

G1

123

HA

NDG

UAR

D SC

REW

6

34FE

ED P

AWL

179

BUFF

ER S

LEEV

E1

124

COVE

R R

ETEN

TIO

N P

IN1

35FE

ED P

AWL

SPR

ING

280

HYD

RAU

LIC

BUFF

ER1

125

BIPO

D LA

TCH

SPR

ING

1

36FE

ED P

AWL

SPR

ING

281

BUTT

STOC

K1

126

FLAT

HEA

D R

IVET

1

37 R

ETAI

NER

RIN

G1

82LA

TCH

SPR

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112

7H

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DGUA

RD

1

38CA

RTR

IDGE

GU

IDE

SPR

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283

BUTT

STOC

K LA

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112

8BI

POD

RET

ENTI

ON

LAT

CH1

39 C

ARTR

IDGE

GU

IDE

184

SCOP

E BA

SE S

CREW

212

9BI

POD

YOKE

1

40CA

RTR

IDGE

GU

IDE

185

CHEE

K PA

D1

130

BIPO

D SC

REW

2

41CO

VER

LAT

CH2

86SL

ING

RIN

G2

131

BIPO

D SP

RIN

G2

42R

ETAI

NIN

G CL

IP1

87RO

LL P

IN1

132

BIPO

D DE

TEN

T2

43R

ETAI

NIN

G CL

IP1

88LA

TCH

PIV

OT S

PRIN

G PI

N3

133

BIPO

D PI

N2

44FE

ED L

EVER

189

BUTT

STOC

K LA

TCH

113

4BI

POD

LEG

COM

PLET

E2

45LO

CK P

IN1

90SP

RIN

G PL

UN

GER

1

barrett.net

51

ITEM

N

O.DE

SCRI

PTIO

NQT

Y.IT

EM

NO.

DESC

RIPT

ION

QTY.

ITEM

N

O.DE

SCRI

PTIO

NQT

Y.

1DR

IVE

SPR

ING

ROD

ASSE

MBL

Y1

46FE

ED T

RAY

191

BUTT

STO

CK L

ATCH

SPR

ING

1

2OP

ERAT

ING

ROD

ASSE

MBL

Y1

47EX

TER

NAL

RET

AIN

ING

RIN

G1

92LA

TCH

STO

P SP

RIN

G PI

N1

3CH

ARGI

NG

HAN

DLE

PIN

148

BELT

RET

AIN

ER P

IN1

93 G

RIP

SCR

EW2

4SP

RIN

G PI

N1

49BE

LT R

ETAI

NER

SPR

ING

194

LEF

T GR

IP1

5FI

RIN

G PI

N1

50BE

LT R

ETAI

NER

195

SAFE

TY A

SSEM

BLY

1

6RO

LLER

BEA

RIN

G

151

HAN

DLE

SPIN

DLE

196

SEA

R/S

PRIN

G PI

N2

7RO

LLER

BEA

RIN

G SP

RIN

G1

52CA

RRY

ING

HAN

DLE

197

TRIG

GER

PIN

1

8RO

LLER

BEA

RIN

G AS

SEM

BLY

153

SPIN

DLE

PIN

198

TRIG

GER

GUA

RD

PIN

1

9BO

LT A

SSEM

BLY,

STR

IPPE

D1

54H

ANDL

E PI

N1

99TR

IGGE

R A

SSEM

BLY

1

10EJ

ECTO

R R

ETEN

TION

PIN

155

HAN

DLE

PIVO

T1

100

TRIG

GER

FR

AM

E1

11EJ

ECTO

R S

PRIN

G1

56H

ANDL

E BR

ACKE

T1

101

TRIG

GER

GUA

RD

1

12EJ

ECTO

R1

57H

ANDL

E PI

N R

ETAI

NIN

G R

ING

110

2R

IGH

T GR

IP1

13EX

TRAC

TOR

158

BAR

REL

ADA

PTER

110

3 T

HR

EADE

D IN

SERT

2

14EX

TRAC

TOR

SPR

ING

159

ROLL

PIN

110

4TR

IGGE

R R

ETEN

TIO

N P

IN1

15EX

TRAC

TOR

PLU

NGE

R1

60H

ANDL

E LO

CK1

105

LOW

ER R

ECEI

VER

ASS

EMBL

Y1

16R

EAR

SIG

HT

BASE

161

CAT

CH S

PRIN

G1

106

DETE

NT

PLU

NGE

R1

17W

INDA

GE K

NOB

PIN

162

BAR

REL

CAT

CH B

RAC

KET

110

7DE

TEN

T PL

UN

GER

SPR

ING

2

18W

INDA

GE K

NOB

163

BAR

REL

COM

PLET

E1

108

DETE

NT

PLU

NGE

R S

PRIN

G DI

VIDE

R1

19FR

ONT/

REA

R S

IGH

T PL

UN

GER

SP

RIN

G2

64FR

ONT

SIGH

T RO

LL P

IN1

109

DETE

NT

PLU

NGE

R R

ETA

ININ

G PI

N1

20R

EAR

SIG

HT

SCAL

E SC

REW

165

FRON

T SI

GHT

SET

SCR

EW1

110

BAR

REL

LAT

CH P

IN1

21R

EAR

SIG

HT

SCAL

E1

66SI

GHT

ADJU

STM

ENT

SPR

ING

111

1BA

RR

EL L

ATCH

1

22R

EAR

SIG

HT

APER

TUR

E1

67FR

ONT

SIGH

T PO

ST1

112

BAR

REL

LAT

CH S

PRIN

G A

SSEM

BLY

1

23EL

EVAT

ION

SCR

EW P

IN1

68SP

RIN

G PL

UN

GER

111

3CH

ARG

ER B

ODY

1

24EL

EVAT

ION

SCR

EW1

69FR

ONT

SIGH

T BO

DY1

114

CHA

RGER

DET

ENT

1

25EL

EVAT

ION

SCR

EW S

PRIN

G1

70GA

S BL

OCK

LOCK

ING

TAB

111

5CH

ARG

ER D

ETEN

T SP

RIN

G1

26EL

EVAT

ION

SCR

EW B

ALL

171

GAS

BLOC

K N

UT

111

6CH

ARG

ER H

AN

DLE

1

27 R

EAR

SIG

HT

BODY

172

FLAS

H H

IDER

111

7 E

JECT

ION

PO

RT C

OVER

HIN

GE

PIN

1

28R

EAR

SIG

HT

BASE

DET

ENT

PLU

NGE

R1

73GA

S CO

LLAR

ASS

EMBL

Y1

118

EJEC

TIO

N P

ORT

COV

ER1

29R

EAR

SIG

HT

BASE

SCR

EW2

74GA

S BL

OCK

111

9EJ

ECTI

ON

PO

RT S

PRIN

G1

30W

INDA

GE S

CREW

SPR

ING

175

GAS

PLU

G1

120

SLOT

TED

SPR

ING

PIN

1

31W

INDA

GE S

CREW

176

CURV

ED B

UTT

PLAT

E1

121

CHA

RGER

DET

ENT

PIN

1

32TO

P CO

VER

ASS

EMBL

Y1

77BU

TTPL

ATE

LOCK

ROD

212

2CH

ARG

ER S

TRA

IGH

T PI

N1

33PA

WL

RET

AIN

ING

PIN

178

RET

AIN

ING

RIN

G1

123

HA

NDG

UAR

D SC

REW

6

34FE

ED P

AWL

179

BUFF

ER S

LEEV

E1

124

COVE

R R

ETEN

TIO

N P

IN1

35FE

ED P

AWL

SPR

ING

280

HYD

RAU

LIC

BUFF

ER1

125

BIPO

D LA

TCH

SPR

ING

1

36FE

ED P

AWL

SPR

ING

281

BUTT

STOC

K1

126

FLAT

HEA

D R

IVET

1

37 R

ETAI

NER

RIN

G1

82LA

TCH

SPR

ING

112

7H

AN

DGUA

RD

1

38CA

RTR

IDGE

GU

IDE

SPR

ING

283

BUTT

STOC

K LA

TCH

112

8BI

POD

RET

ENTI

ON

LAT

CH1

39 C

ARTR

IDGE

GU

IDE

184

SCOP

E BA

SE S

CREW

212

9BI

POD

YOKE

1

40CA

RTR

IDGE

GU

IDE

185

CHEE

K PA

D1

130

BIPO

D SC

REW

2

41CO

VER

LAT

CH2

86SL

ING

RIN

G2

131

BIPO

D SP

RIN

G2

42R

ETAI

NIN

G CL

IP1

87RO

LL P

IN1

132

BIPO

D DE

TEN

T2

43R

ETAI

NIN

G CL

IP1

88LA

TCH

PIV

OT S

PRIN

G PI

N3

133

BIPO

D PI

N2

44FE

ED L

EVER

189

BUTT

STOC

K LA

TCH

113

4BI

POD

LEG

COM

PLET

E2

45LO

CK P

IN1

90SP

RIN

G PL

UN

GER

1

240LW

52

PAGE INTENTIONALLY LEFT BLANK

240L

WP.O. Box 1077

Murfreesboro, TN 37133 USA615.896.2938

615.896.7313 faxbarrett.net

P/N XXXXXX

240lw - barrett · the 240lw is a general-purpose machine gun capable of mounting on a bipod,...

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