US 12,259,205 B2
Barrel nut assembly and method to attach a barrel to a firearm using such assembly
Jesus S. Gomez, Trappe, MD (US)
Assigned to LWRC International LLC, Cambridge, MD (US)
Filed by LWRC International LLC, Cambridge, MD (US)
Filed on Nov. 16, 2022, as Appl. No. 17/988,740.
Application 16/916,026 is a division of application No. 15/332,143, filed on Oct. 24, 2016, granted, now 10,697,726, issued on Jun. 30, 2020.
Application 17/988,740 is a continuation of application No. 16/916,026, filed on Jun. 29, 2020, granted, now 11,530,892.
Application 15/332,143 is a continuation of application No. 13/738,894, filed on Jan. 10, 2013, granted, now 9,506,711, issued on Nov. 29, 2016.
Application 13/738,894 is a continuation in part of application No. 13/562,651, filed on Jul. 31, 2012, granted, now 9,816,546, issued on Nov. 14, 2017.
Prior Publication US 2023/0106732 A1, Apr. 6, 2023
Int. Cl. F41A 21/48 (2006.01); F41A 5/26 (2006.01)
CPC F41A 21/48 (2013.01) [F41A 5/26 (2013.01); Y10T 29/49895 (2015.01)] 11 Claims
OG exemplary drawing
 
1. A fixture configured to rotationally restrain a barrel nut of a gas operated firearm comprising:
two halves each comprising a top surface, a bottom surface, an inner surface, an external surface, a front surface, and a rear surface, wherein said two halves are pivotally secured to each other with pivot rods about said top surfaces of said two halves;
two primary inserts provided within said inner surfaces of said two halves about said front surfaces of said two halves, wherein each of said two primary inserts define a forward face, an interior portion, and a cutout provided on said forward face, wherein said cutout is configured to receive and rotationally restrain said barrel nut during assembly of said gas operated firearm, wherein said interior portion is configured to conform to an exterior profile of said barrel nut, said exterior profile of said barrel nut defined by a surface structure extending between an area behind a flange adjacent to a front end of said barrel nut and a rear end of said barrel nut; and
two secondary inserts provided within said inner surfaces of said two halves about said rear surfaces of said two halves, and adjacent to said two primary inserts, wherein each of said two secondary inserts define an inner portion configured to conform to an exterior profile of an upper receiver of the gas operated firearm.