Aero Precision AR-15 Stripped Upper Receiver - Slick Side - Black

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

AERO PRECISION M5 .308 Stripped Upper Receiver - Anodized Black

AERO PRECISION M5 Stripped Upper Receiver FDE

Battle Arms Development WH556-URS-ODG Workhorse Upper Receiver Aluminum OD Green Anodized Receiver for AR15/M4

AERO PRECISION AR15 5.56 NATO / 223 Rem 20" Complete Upper Receiver w/ Carry Handle | Black

APF AR-15 Stripped Billet Lower Receiver - Matte Black

AERO PRECISION M4E1-T 5.56 NATO 11.5" Complete Upper Receiver | Black