Chien Jung Cheng

US Patent:

20230035912, Feb 2, 2023

Filed:

Sep 27, 2022

Appl. No.:

17/954238

Inventors:

- Las Vegas NV, US
Chien Yuan Cheng - Santa Ana CA, US

International Classification:

F41A 3/72
F41A 35/06
F41A 3/66

Abstract:

A device implementable on a firearm includes a monolithic upper receiver, comprising an upper receiver portion and a handguard portion, which is configured to accommodate non-proprietary barrel assemblies dimensioned according to United States military standard (mil-spec) barrel assembly dimensions and non-proprietary bolt carrier groups (BCGs) dimensioned according to mil-spec BCG dimensions. The device also includes a charging handle assembly configured to be coupled to an operating rod of a gas system of the firearm and forward of a BCG of the firearm. The device further includes a barrel locking system including a locking plate and a locking screw. When the locking screw is screwed into a threaded hole on the locking plate, the locking plate engages with a side of a barrel extension of the barrel assembly in a radial directions perpendicular to a longitudinal axis of the barrel assembly.