Noveske Rifleworks N4 Infidel Complete AR-15 Upper Receiver - 5.56 - 13.7" - FDE

NOVESKE N4 Gen 4 5.56 NATO 10.5" 30rd - FDE

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

RADIAN WEAPONS Model 1 .300 Blackout 9in Black Complete Upper Receiver (R0027)

AERO PRECISION AR15 5.56 NATO / 223 Rem 20" Complete Upper Receiver w/ Carry Handle | Black

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

BUSHMASTER M4 Type Patrolman Flat Top A4 Upper 5.56 16" Black

ALEXANDER AR15 STANDARD UPPER - 300AAC 16" BLACK