SBR Barrels & Upper Receivers

Sons of Liberty Gun Works L89 V2, Complete Upper Receiver, 223 Wylde, 14.5" Button-Rifled Barrel, HUXWRX Flash Hider, Low-Profile Gas Block, Black M4L89UPPER-14.5-556

Sons of Liberty Gun Works

Sons of Liberty Gun Works L89 V2, Complete Upper Receiver, 5.56 NATO, 12.5" Button-Rifled Barrel, A2 Flash Hider, Low-Profile Gas Block, Black M4L89UPPER-12.5-556

Sons of Liberty Gun Works

Sons of Liberty Gun Works L89 V2, Complete Upper Receiver, 5.56 NATO, 11.5" Button-Rifled Barrel, A2 Flash Hider, Low-Profile Gas Block, Black M4L89UPPER-11.5-556

Sons of Liberty Gun Works

Primary Weapons Systems MK114 Mod 1-M, Upper Receiver, 223 Wylde, 14.5" Barrel, No Muzzle Device, Anodized Finish, Black, MLOK Handguard, Long Stroke Piston System, Adjustable Gas System, Fits AR-15 MK1-M1U-223-14-NC

Primary Weapons Systems

Primary Weapons Systems MK111 Mod-1M Upper, Fits AR15, 223 Wylde, 11.85" Barrel, Black Color, Anodized Finish, PWS M-lok 6.9" Handguard MK1-M1U-223-11

Primary Weapons Systems

Faxon Firearms ARAK-21, Complete Upper Receiver, Piston Operated, 7.62x39, 12.5" Barrel, Fits AR-15, Picatinny Handguard, Matte Finish, Black, Includes Bolt Carier Assembly, Magazine Marker Bands and Standard Charging Handle URSSB762P

Faxon Firearms

Colt's Manufacturing Complete Upper, 223 Remington/5.56 NATO, 11.5" Lightweight Barrel, Black Finish, A2 Fixed Front Sight, Magpul BUIS Rear Sight LE6933CK

Colt's Manufacturing

Colt's Manufacturing Upper, 5.56 NATO, 14.5", Black LE6921EPR-CK

Colt's Manufacturing

Battle Arms Development Authority Elite, Complete Upper Receiver, 5.56 NATO, 10.5" Barrel, Fits AR-15, M-Lok Handguard, Anodized Finish, Sniper Gray, Includes Bad Rack-15 C Ambidextrous Charging Handle and AR15/M16 BCG BAD-AUTH-UR10.5G-Y-15C

Battle Arms Development

Battle Arms Development Authority Elite, Complete Upper Receiver, 5.56 NATO, 10.5" Barrel, Fits AR-15, M-Lok Handguard, Anodized Finish, Sniper Gray, Includes Bad Rack-15 Ambidextrous Charging Handle and AR15/M16 BCG BAD-AUTH-UR10.5G-Y-15

Battle Arms Development