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unlocked at level 40. gives the user a machine gun the is located on the front side of the tank and fires in that general direction. you can use the aim button for more accurate shooting, but the tank turret needs to be facing the direction that the machine gun is mounted towards! if you like to sit in tanks and use this perk, double tap will make gunning down infantry easier. be aware, the gun DOES overheat though it does not show the overheat bar. this can be remedied by firing the gun like its a semi-auto to slow down the overheating.