Patent ID: 9016188
Filing Date: 2015-04-28
Classification: F41A,F41C,F41G

Abstract:
1. A firearm having a gas piston system, the firearm comprising: a lower receiver, an upper receiver mounted to the lower receiver, a barrel mounted to the upper receiver, a handguard surrounding at least part of the barrel, an elongated mounting rail defining a first side and an opposite second side, the upper receiver extending from the second side of the elongated mounting rail, a gas piston housing operatively mounted to the barrel and positioned forward of the upper receiver, the gas piston housing aligned with the second side of the elongated mounting rail, a piston and rod assembly operatively mounted to the gas piston housing and positioned above the barrel, the piston and rod assembly including a guide rod and spring, the guide rod is operatively connected at a first end of a piston and is further connected at a second end to a guide rod base, the spring positioned around the guide rod along at least a portion of a length of the guide rod, the piston and rod assembly operatively connected to an operating rod housing which is operatively connected to a bolt carrier in the upper receiver, the operating rod housing defining an elongated tube with a through passageway that receives the guide rod and spring of the piston and rod assembly, and a charging handle operatively connected to the bolt carrier, wherein the elongated mounting rail aligns the gas piston housing and piston and rod assembly.