NEW FRONTIER C10 UPPER RECVR AR10 STRIPPED BILLET BLACK<

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

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

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

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

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

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

AERO PRECISION M5 Complete Upper 22" 6.5 CM SS Fluted SM15 Ano