Cross Machine Tool Ultra Precision AR-15 Upper Receiver - No Forward Assist

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

TACFIRE AR-15 Billet Slick Upper Receiver Black

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

ONE HORSE AR15 A3 Stripped Upper Receiver Anodized

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