Sep 30, 2025

US12429299 - Firearm barrel with non-metal outer sleeve

A firearm barrel with non-metal outer sleeve preferably includes an elongated tube, a first non-metal tube, a second non-metal tube, a sleeve nut and a coupler bushing. A first raised sleeve support section and a raised coupler section are formed on the elongated sleeve. The raised coupler section is formed in substantially a middle of the elongated tube. The bushing inner diameter is sized to slidably receive an outer diameter of the raised coupler section. The first and second non-metal tubes include a tube inner diameter and a plurality of openings formed through a wall thereof. The tube inner diameters are sized to slidably receive an outer diameter of the first raised sleeve support section and each end of the coupler bushing. The sleeve nut retains the first and second non-metal tubes and the coupler bushing on the elongated tube. A second embodiment includes a single non-metal tube.

Assignee: Blackstone Firearms, LLC
Inventors: Aaron E. Painter
Filing date: 2022-09-21

firearmbarrelnon-metal

The patent describes a firearm barrel assembly featuring a non-metal outer sleeve that surrounds a barrel tube, creating an air gap and allowing for enhanced tensioning through a specially designed sleeve nut. This innovative design aims to improve the structural integrity and performance of the firearm barrel while utilizing non-metal materials.

Claim 1

A firearm barrel assembly, comprising: a barrel tube having an outer surface and an inner surface, wherein a sleeve thread is formed on an exit end of said outer surface, said sleeve thread having a distal end and a proximal end; a first non-metal tube having a first outer surface and a first inner surface, said first non-metal tube surrounding said barrel tube and defining an air gap between said outer surface and at least a portion of said first inner surface of said first non-metal tube; a gas block having at least a portion positioned around a length of the barrel tube, at least a portion of said gas block outside a length of said first non-metal tube; and a sleeve nut threaded onto said sleeve thread, said sleeve nut including a tube end and a rotation flange, said tube end extending from said rotation flange, said tube end sized to receive said first inner surface, said sleeve nut threaded past said distal end of said sleeve thread and allowing for said distal end to extend outwardly past said rotation flange, wherein tightening of said sleeve nut is not limited by a discontinuation of said sleeve thread on said barrel tube when said sleeve nut is in contact with said exit end, and wherein tightening said sleeve nut on said barrel tube compresses said first non-metal tube and fully tensions said barrel tube. a barrel tube having an outer surface and an inner surface, wherein a sleeve thread is formed on an exit end of said outer surface, said sleeve thread having a distal end and a proximal end; a first non-metal tube having a first outer surface and a first inner surface, said first non-metal tube surrounding said barrel tube and defining an air gap between said outer surface and at least a portion of said first inner surface of said first non-metal tube; a gas block having at least a portion positioned around a length of the barrel tube, at least a portion of said gas block outside a length of said first non-metal tube; and a sleeve nut threaded onto said sleeve thread, said sleeve nut including a tube end and a rotation flange, said tube end extending from said rotation flange, said tube end sized to receive said first inner surface, said sleeve nut threaded past said distal end of said sleeve thread and allowing for said distal end to extend outwardly past said rotation flange, wherein tightening of said sleeve nut is not limited by a discontinuation of said sleeve thread on said barrel tube when said sleeve nut is in contact with said exit end, and wherein tightening said sleeve nut on said barrel tube compresses said first non-metal tube and fully tensions said barrel tube.

Google Patents

https://patents.google.com/patent/US12429299

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12429299