PSA JAKL 10.5" 5.56 NATO 1/7 Nitride Complete Upper With BCG, Bolt Catch & Bolt Catch Roll Pin, FDE

Spikes Tactical 16" Upper 5.56x45mm 1:7 Quad Rail Mid-Length with BCG, Black - Enhanced Carbine Upper - STU5035CQ2F

Nordic Components 22RB Dedicated 16" Railed Upper .22LR 1:16 no BCG&CH, Black

DPMS DR-15 Oracle II Slick Side 16" 5.56 NATO M-Lok Upper

CMMG Resolute Mk4 AR-15 Complete Upper Receiver 350 Legend 16.1" Barrel

Spike s Tactical 16-inch AR-15 Complete Upper 5.56 NATO M4 LE with 9-inch Rail

Spikes Tactical ST-15 Enhanced Mid-Length Complete Upper 5.56 / .223 Rem 16-inch CHF

Rise Armament Compete Upper Grey .22 ARC 18 Barrel