Bolt carrier and bolt for gas operated firearms

Patent metadata

Field	Value
Publication number	US-9810495-B2
Application number	US-201414575923-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Aug 17, 2011
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

An improved bolt and bolt carrier with integral gas key having an extension nozzle threadedly secured and pinned to the gas key for use with a direct gas operated firearm is provided. The extension nozzle is designed to receive a portion of the host firearm's gas operating system. The firing pin retaining pin is oriented so as to expose its widest profile to the firing pin's annular flange, increasing its service life. The bolt has a plurality of lugs extending from its forward end. The extractor recess is constructed so that the face of the bolt is round and the adjacent lugs fully supported. The extractor engages approximately 17% more of a seated ammunition cartridge's rim as compared to the prior art AR15/M16 extractor. The result is an improved bolt and bolt carrier which provides for increased operational reliability.

First claim

What is claimed is:

1. A bolt for a firearm, the bolt comprising:
a generally cylindrical body having a proximal end and a distal end and a body portion extending therebetween;
said body portion defines an extractor recess and includes at least a first bolt lug and a second bolt lug located adjacent to said body's distal end, said first and second bolt lugs extending radially outwardly from the exterior of said body portion;
an extractor having a proximal end, a distal end and a body portion extending therebetween, said distal end of the extractor having a portion being configured to engage a rim of an ammunition cartridge, said distal end of the extractor is wider than said body portion of the extractor;
said first bolt lug and said second bolt lug define a gap which is connected with and wider than said extractor recess, and wherein said first bolt lug has a sidewall that is coplanar with a first sidewall of said extractor recess, and wherein said second bolt lug has a sidewall that is coplanar with a second sidewall of said extractor recess.

2. The bolt according to claim 1 , wherein said extractor recess acts as a mating surface against which rest a portion of said extractor.

3. The bolt according to claim 2 , wherein said proximal end of said extractor is provided with two nipples which engage with two springs configured to bias said extractor into position against said mating surface.

4. The bolt according to claim 1 , wherein said distal end of said extractor comprises a claw portion configured to engage with the rim of the ammunition cartridge, said claw portion is manufactured to grasp at least twenty six percent of the ammunition cartridge's rim.

Assignees

• Lwrc Int Llc

Inventors

• Gomez Jesus S

Classifications

• F41A5/24 Primary

  by direct action of gas pressure on bolt or locking elements · CPC title

• F41A5/18

  gas-operated · CPC title

• F41A3/64

  Mounting of breech-blocks; Accessories for breech-blocks or breech-block mountings · CPC title

• F41A3/38

  having rocking locking elements, e.g. pivoting levers or vanes · CPC title

• F41A3/26

  semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt · CPC title