ken792
Ultimate Member
You have adjustable plugs like the Schuster, which vent gas out to reduce pressure. You must adjust the screw to tune it to specific types of ammo. There is also the ported plug from Garand Gear, which is simply hollow on the inside. By being hollow, it increases the volume available for gas to expand, so it reduces the pressure.
The GI gas plug comes in single slot and + shaped (to simplify things). The + shaped gas plug has a poppet valve, which is meant for the M7 grenade launcher. The grenade launcher pushes the poppet in and vents all the gas out, so the action will not cycle when firing rifle grenades. Neither are adjustable gas plugs.
http://www.garandgear.com/m1-garand-ammunition
Some commercial ammo peak pressure is within what military ball is, but the ported plug reduces peak pressure while still allowing the gun to cycle.
The GI gas plug comes in single slot and + shaped (to simplify things). The + shaped gas plug has a poppet valve, which is meant for the M7 grenade launcher. The grenade launcher pushes the poppet in and vents all the gas out, so the action will not cycle when firing rifle grenades. Neither are adjustable gas plugs.
http://www.garandgear.com/m1-garand-ammunition
Some commercial ammo peak pressure is within what military ball is, but the ported plug reduces peak pressure while still allowing the gun to cycle.