Compressible bolt carrier extension system
US9103611B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2012 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | May 15, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41A5/26
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A semi-automatic or automatic rifle comprising a barrel attached to and upper receiver and including a compressible bolt carrier extension system. The compressible bolt carrier extension system includes a bolt carrier, an extension spring, two pins, and a reciprocation bolt carrier extension piece. As a whole, the compressible bolt carrier extension system makes possible the use of elongated upper and lower receivers to be used for chambering long-action or other center fire cartridges for use with AR rifles such as the M-16, and M4 etc., eliminating the need for any buffer or buffer tubes other than those commercially available. A further advantage of the compressible bolt carrier extension system is the reduction of felt recoil as the system fully loads during the recoil stroke as it pushes against the buffer absorbing additional recoil energy. The system can be incorporated into firearms using a variety of cartridges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.