Maxim Defense PDX-SD Integrally Suppressed 5.56 NATO Complete Upper Receiver - 5.5"

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

Kgm Technologies | ISURG-556-16-BLK | 5.56 NATO 16.7 in

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

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

EXIGENT DEFENSE FireTeam556 Suppressor 5.56mm/.223 - Black

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