Abstract: A semi-automatic or automatic firearm comprising a hand guard that includes a three dimensional end profile. The three dimensional end profile can depict subject matter related to sporting, outdoors, military, and hunting-related interests, such as the head and face of a warthog or peccary. The firearm can also include a bipod which includes feet configured and shaped to resemble animal feet, such as the hooves of a warthog or peccary.

Abstract: The present disclosure relates to firearm triggers comprising engagement profiles. In various embodiments, a trigger mechanism may include a trigger component and/or trigger shank have a first profile and a second profile. The location of the second profile relative to an operator may be a second of the shape of the first profile.

Abstract: In various embodiments, a firearm assembly devices, systems and methods are provided. The firearm assembly can comprise a barrel and a chamber comprising a channel. The chamber may have a first length. The chamber may comprise an internal wall defining an internal cavity. The chamber can also couple to the barrel. The channel can be defined in the internal wall of the chamber. The channel may have a second length that is shorter than the first length. In various embodiments, the firearm assembly may be a component of a rotating bolt firearm. In various embodiments, internal cavity of the firearm assembly has a profile configured to receive a cartridge. The devices systems and methods described herein reduce common rotating bolt firearm failure modes by encouraging case ejection, compression, and/or contraction.

Abstract: A firearm including an upper receiver having inner bearing surfaces, a barrel having an end coupled to the upper receiver, a reciprocating bolt carrier carried by the receiver and movable between a locked position and an unlocked position, and a metal layer of lubricous material on the inner bearing surfaces. Surfaces of the upper receiver not covered by the metal layer are anodized.

Abstract: A two piece upper receiver for a firearm including a first piece having a front end, a rear end, a top, and a bottom, the first piece constructed to operatively carry a bolt carrier and bolt, and to have a barrel coupled to the front end. The bottom is constructed to have a lower receiver coupled thereto. The first piece includes a backbone extending along the top between the front end and the rear end, the backbone having upwardly directed indexing surfaces. A second piece overlies the backbone and includes mating surfaces engaging the indexing surfaces, aligning the second piece with the first piece. A receiving structure is opposite the mating surfaces for receiving accessory devices mounted thereon. Fasteners fixedly attach the second piece to the first piece to form a complete upper receiver.

Abstract: A two piece upper receiver for a firearm including a first piece having a front end, a rear end, a top, and a bottom, the first piece constructed to operatively carry a bolt carrier and bolt, and to have a barrel coupled to the front end. The bottom is constructed to have a lower receiver coupled thereto. The first piece includes a backbone extending along the top between the front end and the rear end, the back bone having upwardly directed indexing surfaces. A second piece overlies the backbone and includes mating surfaces engaging the indexing surfaces, aligning the second piece with the first piece. A receiving structure is opposite the mating surfaces for receiving accessory devices mounted thereon. Fasteners fixedly attach the second piece to the first piece to form a complete upper receiver.

Abstract: A two piece upper receiver for a firearm including a first piece having a front end, a rear end, a top, and a bottom, the first piece constructed to operatively carry a bolt carrier and bolt, and to have a barrel coupled to the front end. The bottom is constructed to have a lower receiver coupled thereto. The first piece includes a backbone extending along the top between the front end and the rear end, the back bone having upwardly directed indexing surfaces. A second piece overlies the backbone and includes mating surfaces engaging the indexing surfaces, aligning the second piece with the first piece. A receiving structure is opposite the mating surfaces for receiving accessory devices mounted thereon. Fasteners fixedly attach the second piece to the first piece to form a complete upper receiver.

Abstract: A firearm includes a barrel having an end coupled to a receiver. A reciprocating bolt carrier is carried by the receiver and movable between a locked position and an unlocked position. The bolt carrier includes a buttress formed in a top surface thereof. A key includes a base having a rearward end and is coupled to the bolt carrier with the rearward end abutting the buttress.

Abstract: A hand guard assembly for a firearm including a barrel. The assembly includes a tubular unitary body mounted to surround a portion of the barrel substantially coaxially and in a transversely spaced relationship. The tubular body includes a plurality of air flow openings formed therethrough and at least one of a top rail formed as a unitary portion of the tubular body and extending rearwardly along an upper portion of a receiver of the firearm, side accessory rails formed as a unitary portion of the tubular body and on opposed sides of the tubular body, and a bottom accessory rail formed as a unitary portion of the tubular body and on a bottom surface of the tubular body. In the preferred method of fabricating the assembly, the body and any include accessory rails are extruded.

Abstract: A barrel nut for coupling a barrel of a firearm to a receiver includes a body having a first end, an opposing second end, and an outer surface. A bore extends centrally through the body from the first end to the second end. A plurality of heat conducting fins extends radially outwardly from the outer surface of the body. A fastening element fastens the breach end of the barrel nut to the receiver.

Abstract: A push rod operating system for an AR-15/M-16 rifle includes an AR-15/M-16 rifle having a barrel coupled to an upper receiver, a bolt carrier carried by the upper receiver, and a mechanical key coupled to the bolt carrier. A gas block is coupled to the barrel, the gas block having a bore therethough. A rod tube extends from the gas block in communication with the bore, toward the upper receiver. A gas plug has a gas chamber closing the bore of the gas block opposite the rod tube. A discharge gas pathway permits discharge gasses to enter the gas chamber from the barrel. A piston rod element is carried in the rod tube with a piston portion thereof reciprocally received within the bore of the gas block and movable between a first position abutting the gas plug to define an operating volume, and a second position. A push rod element is carried by the rod tube and engages the mechanical key and the piston rod element.

Abstract: A hand guard assembly for a firearm including a barrel. The assembly includes a tubular unitary body mounted to surround a portion of the barrel substantially coaxially and in a transversely spaced relationship. The tubular body includes a plurality of air flow openings formed therethrough and at least one of a top rail formed as a unitary portion of the tubular body and extending rearwardly along an upper portion of a receiver of the firearm, side accessory rails formed as a unitary portion of the tubular body and on opposed sides of the tubular body, and a bottom accessory rail formed as a unitary portion of the tubular body and on a bottom surface of the tubular body. In the preferred method of fabricating the assembly, the body and any include accessory rails are extruded.

Abstract: A firearm includes a barrel having an end coupled to a receiver. A reciprocating bolt carrier is carried by the receiver and movable between a locked position and an unlocked position. The bolt carrier includes a buttress formed in a top surface thereof. A key includes a base having a rearward end and is coupled to the bolt carrier with the rearward end abutting the buttress.

Abstract: A hand guard assembly for a firearm including a barrel. The assembly includes a tubular unitary body mounted to surround a portion of the barrel substantially coaxially and in a transversely spaced relationship. The tubular body includes a plurality of air flow openings formed therethrough and at least one of a top rail formed as a unitary portion of the tubular body and extending rearwardly along an upper portion of a receiver of the firearm, side accessory rails formed as a unitary portion of the tubular body and on opposed sides of the tubular body, and a bottom accessory rail formed as a unitary portion of the tubular body and on a bottom surface of the tubular body. In the preferred method of fabricating the assembly, the body and any include accessory rails are extruded.