Spikes Tactical Punisher Lower/Upper Receiver Set, Semi-automatic, 223 Remington/556NATO, Cerakote Finish, Barrett Brown, Includes 13.2 in SAR3 Rail STS1615-PN3S

Spikes Tactical Complete Upper Receiver, 223 Rem/556NATO, 14.5 in Barrel (16 in OAL with Pinned Brake), Mid-length Gas System, Fits AR Rifles, Black, Flat Top Receiver, No Sights, 12 in CRR Quad Rail, Dynacomp Muzzle Brake, No Mags STU5050-CQ2D

Radian Weapons R0404 Multi Caliber N/A Gray Cerakote Billet Upper Lower Set

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Aero Precision AR-15 Stripped Upper Receiver - Slick Side - Black

SPIKE'S TACTICAL No Logo II Semi-Automatic 223 Rem/556 NATO Black Non-Color Stripped Lower Receiver (STLS045)

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