Chamber insert lock installed within an AR-15/16 barrel extension for locating and reducing movement of an associated sub caliber action
US8726560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2011 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Sep 21, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41A21/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention teaches an insert locking mechanism incorporated into a sub caliber action device, installable within an upper receiver of an AR-15 type firearm, and which interfaces with an upper receiver mounted forward assist for use with such as .22 caliber ammunition and in order to eliminate movement or play of the chamber insert adaptor associated with the substituted sub caliber action. The mechanism includes a generally cylindrical shaped body supported upon the action and exhibiting a plurality of radially projecting and circumferentially extending lugs which are configured to mate and seat within a plurality of grooves circumferentially arrayed within a barrel defined in the upper receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.