Geissele Automatics Super Duty MOD1 Complete AR-15 Upper Receiver - 5.56 - 14.5" P/W

AERO PRECISION M4E1 Threaded Complete Upper 16" 5.56 Barrel w/ 15" M-LOK ATLAS R-ONE Handguard - BLK

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

ALEXANDER ARMS Hunter Complete Upper 6.5 Grendel 18" Blk AR-15

WATCHTOWER TYPE 15M COMP. UPPER .223 WYLDE 16" BLACK

ALEXANDER UPPER RECEIVER AR15 - PISTOL 50 BEOWULF 12" TB BLK

AERO PRECISION M5 20" .308 CMV Complete Upper Receiver w/ ATLAS S-ONE M-Lok 15" Handguard

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