Firearm having gas piston system

摘要

A firearm having a gas piston system includes a bolt carrier, an adjustable gas piston block located forward on the firearm and an over-the-barrel spring and guide rod arrangement, all of which is housed and contained in a top rail that runs the length of the firearm and that maintains the alignment of these firearm components. The firearm also includes an ambidextrous, non-reciprocating charging handle located forward on the firearm and positioned within the top rail for charging the firearm.

主权项

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.