GunClaims
Weekly firearms and ammunition patent grants.
Dec 23, 2025

US12504245 - Firearm receiver systems offering a fixed-barrel arrangement and pressure relief capability

A firearm receiver system comprises a receiver and a handguard. The receiver includes a front mounting body and a central bore configured for having a bolt carrier slidably disposed therein. The central bore includes a barrel-receiving receptacle at least partially located within the front mounting body. The handguard includes a handguard mounting body receptacle at a first end portion thereof. The front mounting body includes a plurality of interior surfaces each matingly engaged with a corresponding one of a plurality of exterior surfaces of the handguard mounting body receptacle. The receiver and the handguard may unitarily-formed body. The receiver may be configured for accommodating a barrel extension. The front mounting body may be configured for providing a fixed-barrel receiver system. The receiver may accommodate a pressure relief body for enabling the receiver to exhibit pressure relief functionality in the event of an over-pressure event within the receiver.

firearmreceiverbarrelpressure relief

The patent describes a firearm receiver system that features a fixed-barrel arrangement and a pressure relief capability, allowing for enhanced safety during over-pressure events. It includes a central bore for a bolt carrier, a barrel extension with a retention mechanism, and a fastener to secure the barrel extension within the receiver.

Claim 1

1 . A firearm receiver system, comprising: a receiver including a central bore configured for having a bolt carrier slidably disposed therein, wherein the central bore includes a barrel-receiving receptacle at a forward end portion of the receiver; a barrel extension engageable within the barrel-receiving receptacle, wherein the barrel extension includes a mating retention portion and wherein the mating retention portion is one of a passage that extends through a peripheral wall of the barrel extension and a recess within the peripheral wall of the barrel extension; and a fastener having a first portion selectively engageable and dis-engageable with the receiver and a second portion for extending from the first portion of the fastener into the barrel-receiving receptacle to enable engagement with the mating retention portion of the barrel extension when the barrel extension is engaged within the barrel-receiving receptacle, wherein the second portion of the fastener is engaged with the mating retention portion and wherein the mating retention portion is the passage and the passage includes a gas relief orifice therein. a receiver including a central bore configured for having a bolt carrier slidably disposed therein, wherein the central bore includes a barrel-receiving receptacle at a forward end portion of the receiver; a barrel extension engageable within the barrel-receiving receptacle, wherein the barrel extension includes a mating retention portion and wherein the mating retention portion is one of a passage that extends through a peripheral wall of the barrel extension and a recess within the peripheral wall of the barrel extension; and a fastener having a first portion selectively engageable and dis-engageable with the receiver and a second portion for extending from the first portion of the fastener into the barrel-receiving receptacle to enable engagement with the mating retention portion of the barrel extension when the barrel extension is engaged within the barrel-receiving receptacle, wherein the second portion of the fastener is engaged with the mating retention portion and wherein the mating retention portion is the passage and the passage includes a gas relief orifice therein.

Google Patents

https://patents.google.com/patent/US12504245

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12504245