RADICAL FIREARMS FORGED COMP UPPER 5.56 NATO 16\" RIFLE KIT AR15 LPK M4 STK 12\" RAIL

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

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

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

Sons of Liberty Gun Works SOLGW 14.50" Upper 5.56x45mm M-LOK Rail - Tactical Excellence - M4L89BSCHF14.5

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

TACFIRE Rifle Kit 308 Win 16" AR Platform Black