PRIMARY WEAPONS SYSTEMS MK116 Pro Upper 223 Wylde/5.56 16.1" Black

Wraithworks WARP-15 Polymer AR15 Rifle - Black | .223 Wylde | 16" Black Nitride Pencil Barrel

AERO PRECISION AC-15M RIFLE - 5.56 NATO 16" BBL BLACK

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

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

BATTLE ARMS Workhorse Upper Recv 5.56 16" AR-15 Sniper Gray

BUSHMASTER V-Radicator 223 Wylde 18" 10rd - Black

BUSHMASTER QRC Upper 5.56 NATO 16" - Black