Noveske Rifleworks N4 SPR Complete AR-15 Upper Receiver - 6mm ARC - 18" - FDE

RADIAN WEAPONS Model 1 .223 Wylde 10.5in Black Complete Upper Receiver (R0023)

CMMG Resolute MK4 6MM ARC 16.1" 10rd - Sniper Grey

RADIAN WEAPONS Model 1 .223 Wylde 14.5in Black Complete Upper Receiver (R0024)

RADIAN WEAPONS Model 1 .223 Wylde 16in Black Complete Upper Receiver (R0025)

RADIAN WEAPONS Model 1 6mm ARC 14.5in Radian Black Complete Upper (R0898)

RADIAN WEAPONS Model 1 6mm ARC 18in Radian Black Complete Upper (R0903)

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