Apr 7, 2026

US12595985 - Customer-serviceable forearm assembly

A firearm forearm assembly is provided. Generally included is a forearm retainer that is a flexible component installed in the forearm, which is then momentarily deflected to admit each action bar. Once the forearm assembly is installed in the firearm, the firearm's magazine tube is introduced and prevents further deflection of the retainer, thus locking the forearm assembly together during use. As a result, the forearm assembly is easily disassembled by the user without the use of tools by deflection of the retainer and removal of the action bars. But at the same time, the integrity of the firearm is preserved during operation.

Assignee: O.F. MOSSBERG & SONS, INC.
Inventors: John Wilson, Peter Duperry
Filing date: 2025-01-22

firearmforearmassembly

The patent describes a customer-serviceable forearm assembly for firearms that allows users to easily disassemble the forearm without tools by deflecting a flexible retainer. This design ensures that the assembly remains securely locked during operation while providing convenient access for maintenance.

Claim 1

1 . A forearm assembly for a firearm, the forearm assembly comprising: an elongated forearm including a hollow center defining an interior surface, said interior surface including a forearm bar slot along its length and a retainer slot along its circumference; a retainer configured to be inserted into the retainer slot of the forearm; said retainer including a retainer bar slot that is aligned with said forearm bar slot when the retainer is inserted into the retainer slot; an action bar configured to be inserted into said forearm bar slot and retainer bar slot such that the action bar is locked in place between the interior surface of the forearm and the retainer. an elongated forearm including a hollow center defining an interior surface, said interior surface including a forearm bar slot along its length and a retainer slot along its circumference; a retainer configured to be inserted into the retainer slot of the forearm; said retainer including a retainer bar slot that is aligned with said forearm bar slot when the retainer is inserted into the retainer slot; an action bar configured to be inserted into said forearm bar slot and retainer bar slot such that the action bar is locked in place between the interior surface of the forearm and the retainer.

Google Patents

https://patents.google.com/patent/US12595985

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12595985