Sons of Liberty Gun Works Broadsword-89 6mm MAX Upper Barreled Receiver - 16"

SOLGW M4-L89 Broadsword 5.56mm 11.5" No BCG/CH Upper Receiver M4L89BSUPPER-11.5-556

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

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

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

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

LWRC SIX8 PSD Complete Upper Receiver 6.8 REM SPC 8.5" - Black