Geissele Automatics Super Duty Stripped AR-15 Receiver Set - DDC - BLEM

AERO PRECISION M4E1 Multi Caliber Complete AR15 Lower Receiver w/ A2 Grip & M4 Stock - FDE

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER BLACK

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

ONE HORSE AR15 A3 Stripped Upper Receiver Anodized

FAXON AR-15 X-TRA LITE RECEIVER SET OD GREEN STRIPPED

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

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