2A ARMAMENT Xanthos-Lite Receiver Set - Black Oxide

Radian Weapons Model 1 10" Upper Receiver and Handguard Set, Flat Dark Earth

KIDD Classic Slip Fit Receiver, Black

Wraithworks Billet Slick Side AR-15 Upper Receiver - Black | No Forward Assist or Brass Deflector

AERO PRECISION M5 308 Win Assembled Upper Receiver | OD Green

GUNTEC AR15 STRIPPED BILLET - UPPER RECEIVER BLACK

AERO PRECISION M5 .308 Stripped Upper Receiver - Anodized Black

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