Barrel nut assembly and method to attach a barrel to a firearm using such assembly

Register USPTO Patent
Application Number 13562651
Grant Number 09816546
Status In Force
Filing Date 2012-07-31
First Publication Date 2014-03-20
Publication Date 2014-03-20
Grant Date 2017-11-14
Owner LWRC International LLC (USA)
Inventor Gomez, Jesus S.


A firearm barrel nut assembly including barrel nut, generally cylindrical in shape with a threaded central bore, and an externally threaded locknut which is used in conjunction with the barrel nut to secure a barrel to a firearm upper receiver. The barrel nut has an integral bushing on its exterior constructed to support either the gas tube or piston of the host firearm's operating system. The barrel nut is configured so that it may be independently and non-rotationally held within a vice or other fixture during installation of the barrel and while the locknut is tightened to a preset torque to hold the barrel in place while the barrel nut is independent of the torque applied to the locknut to properly secure the barrel to the upper receiver.

IPC Classes  ?

  • F41A 21/48 - Barrel mounting means, e.g. releasable mountings for replaceable barrels
  • F16B 37/00 - Nuts or like thread-engaging members