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US 11,686,548 B2Granted
Firearm receiver assembly
AssigneeLWRC International LLC
InventorJesus S. Gomez
Life of this patent
Estimating the term…
Abstract
An upper receiver assembly for a firearm having an upper receiver with an integral barrel nut, a handguard assembly and a barrel nut assembly with a barrel and lock nut is provided. The barrel is received by the upper receiver and is secured directly to the upper receiver using the lock nut. The upper receiver also includes an integral handguard mounting member to which the handguard assembly may be directly attached. The upper receiver assembly allows the user to attach both the barrel and handguard assemblies directly to the upper receiver, independently of one another.
Claims16
An upper receiver assembly for use with a firearm having a gas operating system, the upper receiver assembly comprising:
- a barrel assembly having a barrel, an annular flange about a back end of said barrel and a lock nut encircling a portion of the barrel;
- an upper receiver including a front end having a receiver extension extending therefrom, wherein said receiver extension is substantially shaped like an elongated cylinder with its top portion removed, a forward end of said receiver extension having a substantially cylindrical opening with a threaded interior into which the back end of said barrel assembly is received, said forward end having a bearing surface against which said annular flange of the barrel assembly rests, said threaded interior constructed to cooperate with threads on an outer surface of said lock nut so that said locknut, when threadedly secured inside the receiver extension, mounts said barrel assembly directly to said receiver extension of said upper receiver;
- and
- a handguard assembly having a bottom segment and a separable top segment.
1 more element
An upper receiver assembly for use with a gas operated firearm having a gas operating system, the upper receiver assembly comprising:
- a barrel having an annular flange about its back end;
- a lock nut fitted around a portion of said barrel;
- an upper receiver having a receiver extension on a forward end thereof, wherein said receiver extension is substantially shaped like an elongated cylinder with its top portion removed, said receiver extension having an interior circular channel wherein a portion of said barrel is received, said receiver extension being threaded about its interior and machined to be larger in diameter than said annular flange of said barrel and to threadedly receive said lock nut, a forward end of said interior circular channel having a bearing surface against which said annular flange of said barrel rests when the barrel and upper receiver are threadedly coupled with one another and secured by the lock nut;
- and
- a handguard assembly including a top segment and a bottom segment, said bottom segment having a rearward end machined to receive and be secured to the receiver extension, said top segment being removably coupled to said bottom segment and restrained from movement by said bottom segment, wherein a rear portion of said handguard bottom segment being substantially cylindrical with a correspondingly cylindrical inner bore, said receiver extension being received within said bottom segment inner bore and secured thereto with fastening elements to mount the handguard assembly directly to the receiver extension.
2 more elements
An automatic firearm comprising:
- a buttstock and pistol grip;
- a lower receiver assembly;
- a barrel assembly having a barrel, an annular flange about aback end of said barrel and a lock nut encircling a portion of the barrel;
- a gas operating system;
- an upper receiver assembly, said upper receiver assembly including,
- an upper receiver with a receiver extension on a forward end thereof, wherein said receiver extension is substantially shaped like an elongated cylinder with its top portion removed, said receiver extension having an interior circular channel wherein a portion of said barrel is received, said receiver extension being threaded about its interior and machined to be larger in diameter than said annular flange of said barrel and to threadedly receive said lock nut, a forward end of said interior circular channel having a bearing surface against which said annular flange of said barrel rests when the barrel and upper receiver are threadedly coupled with one another and secured by the lock nut, and a placement above the receiver extension on a forward face of said upper receiver, said placement supporting and preventing rotation of a spring cup of said gas operating system;
- and
- a handguard assembly including a top segment and a bottom segment, said bottom segment having a rearward end machined to receive and be secured to the receiver extension, said top segment being removably coupled to said bottom segment and restrained from movement by said bottom segment.
5 more elements
Dependencies are inferred from the claim text.