AERO PRECISION M5E1 Enhanced Assembled Upper Receiver | Anodized Black

AERO PRECISION M5 308 Assembled Upper Receiver | Kodiak Brown Anodized

AERO PRECISION M5 308 Win Assembled Upper Receiver | OD Green

AERO PRECISION M5 .308 Stripped Upper Receiver - Anodized Black

AERO PRECISION AR15 Complete Upper 16" 5.56 M4

AERO PRECISION M4E1 Threaded Complete Upper 16" 5.56 Barrel w/ 15" M-LOK ATLAS R-ONE Handguard - BLK

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

Stern Defense Assembled Upper Receiver, Black