Patent ID: 9719739
Date: 2017-08-01
CPC Classifications: F41A

Claim:
1. A gas block balancing assembly for an auto-loading firearm, said assembly comprising: a housing having forward and rearward ends, said housing configured for attachment to a rifle barrel having a first gas port, a cylinder chamber disposed within said housing, said housing including an inlet port extending from said cylinder chamber and disposed to receive pressurized gas from the first gas port of the barrel, said housing including an outlet port extending from said cylinder chamber, a gas tube receptacle disposed in said housing, said gas tube receptacle configured to couple with a gas tube conduit, an adjustment plug disposed in said cylinder chamber, said adjustment plug having a nipple portion extending into said cylinder chamber generally along said cylinder axis, a balancing piston disposed in said cylinder chamber for axial sliding movement between a gas transmitting position and a bypass position, said balancing piston having a first end disposed adjacent said end wall of said cylinder and an opposite second end disposed adjacent said adjustment plug, a biasing member operatively disposed between said adjustment plug and said balancing piston for urging said balancing piston toward said gas transmitting position, and a counter-balance chamber extending into said second end of said balancing piston, said counter-balance chamber comprising a generally cylindrical bore disposed generally along said cylinder axis, said counter-balance chamber having an internal diameter configured to mate with said nipple of said adjustment plug in close-fitting sliding engagement.