Sep 29, 2026

US12747920 - Bearing delayed firearm operating systems

A firearm operating system includes a bolt with at least one bearing cavity, a carrier disposed on a rear side of the bolt, a plurality of bearings, and a barrel extension. The carrier includes a cavity. The plurality of bearings are retained in the barrel extension. The plurality of bearings are movable relative to the barrel extension.

Inventors: James Matthew Underwood, Larry Cullen Underwood
Filing date: 2025-02-21

firearmoperating_systemmechanism

The patent describes a firearm operating system that incorporates a bolt with a bearing cavity, a carrier, and a barrel extension, allowing for improved cycling during operation. The design features movable bearings retained within the barrel extension, enhancing the functionality when the bolt is disengaged.

Claim 1

1 . A firearm operating system comprising: a bolt comprising at least one bearing cavity; a carrier disposed on a rear side of the bolt, wherein the carrier comprises a cavity; a plurality of bearings; and a barrel extension, wherein: the plurality of bearings are retained in the barrel extension during cycling of the firearm operating system including when the bolt is disengaged from the barrel extension; and the plurality of bearings are movable relative to the barrel extension. a bolt comprising at least one bearing cavity; a carrier disposed on a rear side of the bolt, wherein the carrier comprises a cavity; a plurality of bearings; and a barrel extension, wherein: the plurality of bearings are retained in the barrel extension during cycling of the firearm operating system including when the bolt is disengaged from the barrel extension; and the plurality of bearings are movable relative to the barrel extension.

Google Patents

https://patents.google.com/patent/US12747920

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12747920