5.56x45mm NATO Upper Receivers

Dirty Bird 10.5" Government Carbine 5.56 M-LOK Upper Assembly - V2, Midnight Bronze

Dirty Bird 10.5" Government Carbine 5.56 M-LOK Upper Assembly - V2, FDE

Dirty Bird 16" 5.56 NATO Govt M-LOK AR-15 Complete Upper Assembly V3 - FDE

Dirty Bird 20" M16A2 Enhanced AR 15 Retro Upper Assembly - Chrome-Lined

M16A1 Stripped Upper Receiver - M4 Feedramps

M16A1 Assembled Upper Receiver - With M4 Feedramps

Dirty Bird 7.5" Pistol 5.56 M-LOK AR-15 Complete Upper Assembly - Midnight Bronze

Dirty Bird 7.5" Pistol 5.56 M-LOK AR-15 Complete Upper Assembly - FDE

Dirty Bird 7.5" Pistol 5.56 M-LOK AR-15 Complete Upper Assembly - Black

16" 5.56 NATO Cold Hammer Forged Rifle Build Kit

11.5" Slick Side Billet 5.56 Pistol M-LOK Upper Assembly

Premium Series 16" 5.56 Upper Assembly w/ Rosco Barrel and Geissele MK14

8" Pistol 5.56 Stainless M-LOK Upper Assembly

2A Armament Palouse-Lite 16.5" 5.56 NATO Complete Upper

Sons Of Liberty Gun Works East India Starter Kit 5.56 Barreled Upper - 10.5"

7.5" 5.56 NATO Pistol AR-15 Complete Upper Assembly

10.5" 5.56 NATO Pistol AR-15 Complete Upper Assembly

Colt's Manufacturing LE6920 AR 15 5.56 NATO Complete Upper

7.5" 5.56 AR 15 Lightweight Pistol AR-15 Complete Upper Assembly With M-LOK Handguard

10.5" 5.56 Gov / SOCOM Carbine M-LOK AR 15 Complete Upper Assembly

Sport 16" 5.56 Gov / SOCOM Midlength M-LOK Upper Assembly

Aero Precision 20in 5.56 NATO AR 15 Upper

Centurion Arms C4 5.56 Billet AR-15 Upper Receiver

Centurion Arms CM4 5.56 Forged AR-15 Upper Receiver