Bravo Company Manufacturing M4 AR-15 Upper Receiver Assembly - Open Box

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

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

ONE HORSE AR15 A3 Stripped Upper Receiver Anodized

BEAR CREEK ARSENAL 5.56 NATO COMPLETE UPPER 10. BRL 1:7 TWIST CARBINE LENGTH GAS MLOK

TACFIRE AR-15 Billet Slick Upper Receiver Black

BEAR CREEK ARSENAL 300 B/O COMPLETE UPPER 7.5 BRL 1:7 TWIST PISTOL LENGTH GAS MLOK

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK