Spike's Tactical Complete AR-15 Upper Receiver with FSB - .300 Blackout - 16"

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

ALEXANDER AR15 STANDARD UPPER - 300AAC 16" BLACK

SPIKES TACTICAL Complete Upper 5.56x45 16" Black Mid-length AR15

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

Aero Precision M5 AR-308 Stripped Upper Receiver - FDE Cerakote

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

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