Patent ID: 8869674
Filing Date: 2014-10-28
Classification: F41A

Abstract:
1. A gas system for a firearm having a barrel with a bore and a gas port in communication with the bore, the gas system comprising: a gas block coupled to the barrel, the gas block comprising: a pressure sleeve removeably mounted inside the gas block, the pressure sleeve comprising: an operating rod movably mounted in the gas block, the operating rod comprising a cup configured to fit over the projection; a valve mountable to the gas block, the valve comprising: a spring mounted around the rod for biasing the rod toward the gas block; wherein gas discharged from a fired cartridge flows through the gas port, the gas capture port, the gas conduit and the rod conduit and against the rod cup to drive the rod to reload the firearm; and the plug is moveable by the knob to a plurality of positions to alter the gas conveyed to the operating rod.