SELF REGULATING GAS SYSTEM FOR SUPPRESSED WEAPONS

摘要

A gas system for an autoloading firearm wherein the gas used to cycle the weapon can be restricted automatically through a mechanical shutoff actuated by the installation of a suppressor on the weapon. The gas system could be used to actuate either a piston to mechanically operate the weapon or a gas impingement mechanism wherein the gas is redirected into the bolt carrier assembly to directly actuate the unlocking and cycling of the bolt and bolt carrier group. A gas block for the firearm includes a spring-loaded plunger assembly positioned within a bore of the gas block and oriented parallel to a bore of a barrel of the firearm, the plunger assembly including a regulator plunger, a regulator bushing, a regulator spring, and a regulator cap. Mounting a suppressor over the muzzle depresses the regulator plunger driving it rearward, the rearward movement of the regulator plunger blocking one of gas ports in the gas block to automatically reduce the volume of propellant gases directed into the gas system.

主权项

1. A self-regulating gas system for a weapon having a barrel with a bore defined therealong and a muzzle end configured to receive a suppressor, the gas system comprising:
a gas block mounted along the barrel and communicating with a gas tube to redirect a volume of propellant gases received from the barrel to cycle the weapon, the gas block including a plurality of gas ports for directing propellant gases received from the barrel into the gas block; and a spring-loaded plunger assembly received within a regulator bore of the gas block and located adjacent a forward end thereof, the plunger assembly including a regulator plunger movable along the regulator bore, and a regulator spring positioned along the regulator bore adjacent the regulator plunger and configured to urge the regulator plunger toward a position forward of the gas ports of the gas block; wherein when the suppressor is received and mounted over the muzzle of the weapon, the regulator plunger is caused to move rearwardly to a position sufficient to substantially block at least one of the gas ports in the gas block to reduce the volume of propellant gases received within the gas system.