PSA Sabre AR-15 "M4A1" CHF CL 14.5" P&W Upper w/ Surefire Warcomp, Quad Rail and Vertical Grip

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

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

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

Rise Armament Compete Upper Grey .22 ARC 18 Barrel

CMMG Resolute Mk4 AR-15 Complete Upper Receiver 6mm ARC 16" Barrel

Rise Armament AR-15 Complete Upper Receiver 22 ARC 18" Barrel 15" M-LOK Handguard Rifle Length Black

Rise Armament AR-15 Complete Upper Receiver 22 ARC 18" Barrel 15" M-LOK Handguard Rifle Length Patriot Brown