I've lubricated the bolt but wont cycle the round.My Dealer told me never lubricate gas piston or cylinder
because it can deformed the gas cylinder .it has to do with either gas settings or ammo.Gas plug has line groove aligned with sight blade not the blank side for grenade launching
because it can deformed the gas cylinder .it has to do with either gas settings or ammo.Gas plug has line groove aligned with sight blade not the blank side for grenade launching