Sons Of Liberty Gun Works M4 L89 Broadsword CHF 5.56 Barreled Upper Receiver - 13.9" - No Muzzle Device

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

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

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

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

TACFIRE AR-15 Billet Slick Upper Receiver Black