Patent ID: 8607688

Claim:
An adjustable gas regulator for use with a gas operated firearm, the adjustable gas regulator comprising: a gas block configured to receive a barrel of a firearm and defining a gas block bore; a gas port defined within the gas block bore, the gas port being positioned to communicate with a gas port aperture of a firearm; a gas regulating cylinder dimensioned to be rotatably received within the gas block bore, the gas regulating cylinder defining a plurality of cylinder gas ports of different sizes spaced about the periphery of the gas regulating cylinder, wherein the gas regulating cylinder is rotatably positioned within the gas block bore such that the gas regulating cylinder is rotatable to selectively position any one of the cylinder gas ports in communication with the gas port of the gas block bore; and an adjustment knob secured to one end of the gas regulating cylinder, the adjustment knob being rotatably fixed in relation to the gas regulating cylinder such that rotation of the adjustment knob effects corresponding rotation of the gas regulating cylinder, the adjustment knob including interlocking structure to releasably retain the adjustment knob in a plurality of fixed positions in relation to the gas block, wherein the adjustment knob is movable axially using a single hand to selectively disengage the interlocking structure to facilitate rotation of the adjustment knob and the gas regulating cylinder.