PSA Guardsman-15 10.3" 5.56 NATO 1/7 CL Phosphate 9" MLOK Upper with BCG & CH

Battle Arms Development Workhorse AR-15 Upper 16 Barrel 5.56 NATO 15 M-LOK Handguard

Angstadt Arms AR-15 Complete 9mm Upper Assembly 6 Barrel

AR-STONER AR-15 Complete Upper Receiver 45 ACP 16" Barrel

Nordic Components 22RB AR-15 Complete Upper Receiver 22 Long Rifle 16" 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

AR-STONER AR-15 Complete Upper Receiver 300 Blackout 16" Barrel