Firearm having gas piston system
AssigneeRock River Arms, Inc.
InventorsMark Larson, Lester Larson, Jr.
Life of this patent
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Abstract
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.
Claims22
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 elongated mounting rail positioned above the upper receiver, the upper receiver mounted to 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 slidably mounted to 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 operatively connected to a bolt carrier disposed in the upper receiver, and
- a charging handle operatively connected to the bolt carrier,
- wherein the elongated mounting rail extends above and across and mounts and aligns the gas piston housing, upper receiver, and piston and rod assembly.
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 the barrel,
- an elongated mounting rail defining a first side and an opposite second side, the elongated mounting rail positioned above the upper receiver, the upper receiver mounted to the second side of the elongated mounting rail, a gas piston housing slidably mounted to the second side of the elongated mounting rail, and positioned forward of the upper receiver, the gas piston housing configured to receive the barrel,
- a piston and rod assembly operatively mounted to the gas piston housing and positioned above the barrel, the piston and rod assembly operatively connected to a bolt carrier disposed in the upper receiver,
- a non-reciprocating charging handle operatively connected to the bolt carrier, and
- an elongated tube mounted within the upper receiver and connected to the bolt carrier, the elongated tube defining a tube end that functions as a contact point for the piston during cycling of the firearm;
- wherein the elongated mounting rail extends above and across and mounts and aligns the gas piston housing, upper receiver, and piston and rod assembly.
Dependencies are inferred from the claim text.