Free Weapon UpgradesIn this article we will guide you to exploit and take advantage of early in the game gta 5 cheats, right after you unlock Trevor. You can unlock all the weapons and upgrades absolutely free gun. This might change in the future so you should use as soon as possible to serve his gaming easy.

Steps you must perform these stories:1. Make a task with Trevor2. Go to the Gun Shop and enter the store.3. Buy a gun that you want to upgrade. Also can buy grenades.4. You will fail the task when you are out and the grenade exploded.5. You’ll have all the money and all the weapons you have previously unlocked will be provided for free when you restart the mission

Source: http://www.gta5cheatsps4.com/free-weapon-upgrades.html