Blackout Defense .223 Wylde 13.9 Barrel Mid Length Fixed Gas Block Forward Assist FDE Upper Receiver

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

TACFIRE AR-15 Billet Slick Upper Receiver Black

DIAMONDBACK FIREARMS QPQ 223 Wylde 18" Black Stainless Steel Barrel

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

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

Sons of Liberty Gun Works L89 Combat V2 AR-15 13.7" Pinned CMV 5.56 NATO Assembled Upper Receiver w/ NOX-9 Flash Hider

AERO PRECISION M5 20" .308 CMV Complete Upper Receiver w/ ATLAS S-ONE M-Lok 15" Handguard