Evolve Weapon System AR-15 A2 Stripped Upper Receiver - Black

ONE HORSE AR15 A3 Stripped Upper Receiver Anodized

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

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

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

TACFIRE AR-15 Billet Slick Upper Receiver Black

AERO PRECISION M4E1 Rifle Cmplt Lower Rcv A2 Grip No Stock Black

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