Jul 29, 2025

US12372321 - Conversion kit for replacing a barrel on a service weapon with a training barrel to fire reduced energy training rounds

A conversion kit for installation into weapon to replace the service barrel with a sub-caliber barrel for firing reduced energy training cartridges. The conversion kit includes a barrel sleeve, a barrel support and a collet disposed between in the barrel support for fixedly securing the barrel sleeve therein. The collet is disposed in a double tapered bore formed in the barrel support for fixedly securing the barrel sleeve at both ends of the collet into the barrel support. A flash hider, which has been removed from the service barrel, is threadably received in the barrel support and functions as a collet nut for clamping the collet onto the barrel sleeve.

Assignee: GENERAL DYNAMICS ORDNANCE AND TACTICAL SYSTEMS—CANADA, INC.
Inventors: Richard Dion, Erick Picard
Filing date: 2023-10-25

conversiontrainingbarrelfirearm

The patent describes a conversion kit designed to replace a service weapon’s barrel with a training barrel that accommodates reduced energy training cartridges. This kit includes components such as a barrel sleeve, barrel support with a tapered bore, and a collet for securely holding the barrel sleeve in place.

Claim 1

A conversion kit for a weapon to replace a service barrel with a training barrel for firing reduced energy training cartridges, the conversion kit comprising: a barrel support having a tapered bore extending from a muzzle end of the barrel support and a cylindrical bore extending from a breech end of the barrel support and into the tapered bore, wherein the tapered bore has a first cylindrical section, a second cylindrical section and a first tapered section between the first and second cylindrical sections; a collet including a shoulder disposed in the first cylindrical section and a sleeve portion disposed in the second cylindrical section, wherein a collet bore extends through the collet; a barrel sleeve disposed through the cylindrical bore of the barrel support and through the collet bore; and a collet nut disposed in the first cylindrical portion of the tapered bore and engaging the collet to clamp the barrel sleeve in the barrel support at the first tapered section. a barrel support having a tapered bore extending from a muzzle end of the barrel support and a cylindrical bore extending from a breech end of the barrel support and into the tapered bore, wherein the tapered bore has a first cylindrical section, a second cylindrical section and a first tapered section between the first and second cylindrical sections; a collet including a shoulder disposed in the first cylindrical section and a sleeve portion disposed in the second cylindrical section, wherein a collet bore extends through the collet; a barrel sleeve disposed through the cylindrical bore of the barrel support and through the collet bore; and a collet nut disposed in the first cylindrical portion of the tapered bore and engaging the collet to clamp the barrel sleeve in the barrel support at the first tapered section.

Google Patents

https://patents.google.com/patent/US12372321

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12372321