Bolt carrier and bolt for gas operated firearms

Patent metadata

Field	Value
Publication number	US-10598452-B2
Application number	US-201715806137-A
Country	US
Kind code	B2
Filing date	Nov 7, 2017
Priority date	Aug 17, 2011
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

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:
an elongate body having a proximal end and an opposite distal end along a longitudinal axis and a firing pin bore along said longitudinal axis between said proximal and distal ends, said body defining a generally cylindrical portion near the distal end which is perpendicular to the longitudinal axis of said elongate body; an extractor having a front end and back end with a body portion extending therebetween, said front end defines a surface which is perpendicular to the longitudinal length of said body portion; said elongate body of said bolt includes an annular structure located about said distal end where at least a first bolt lug and a second bolt lug radially extend there from, said elongate body defines an extractor recess;
said annular structure is interrupted between said first bolt lug and said second bolt lug, where said annular structure is interrupted adjacent said first bolt lug a first side wall and a second side wall are formed, where said annular structure is interrupted adjacent said second bolt lug a third side wall and a fourth side wall are formed;
said first and third side walls each extending in respective planes, positioned such that the respective planes never intersect, said first and third side walls define a gap between said first and second bolt lugs;
said second and fourth side walls each extending in respective planes, positioned such that they intersect between said gap and said firing pin bore of said cylindrical surface.

2. The bolt of claim 1 , wherein said second side wall is coplanar with a side wall of said first bolt lug and said fourth side wall is coplanar with a side wall of said second bolt lug.

3. The bolt of claim 1 , wherein said second and fourth side walls define a top surface which is coplanar with the top of said cylindrical surface.

4. The bolt of claim 1 , wherein the gap which is formed between said first and third side walls is larger than the gap formed between said second and fourth side walls.

5. The bolt of claim 4 , wherein said gap between said first and third side walls is configured to receive said front end of said extractor, said gap formed between said second and third side walls is configured to receive a portion of said extractor body.

6. The bolt of claim 1 , wherein said perpendicular surface of said extractor's front end comes to two points which are located opposite each other, said two points are coplanar and occupy a plane which intersects near the approximate center of the point about which said extractor rotates.

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

• F41A19/06

  Mechanical firing mechanisms, {e.g. counterrecoil firing, recoil actuated firing mechanisms}(F41A19/01 - F41A19/05, F41A19/59 take precedence) · CPC title

• F41A3/38

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

• F41A3/64

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

• F41A5/18

  gas-operated · CPC title