Colt's Manufacturing LE6933 Enhanced Patrol Rifle II Upper, Complete Upper Receiver, .223 Remington/5.56 NATO, 11.5" Chrome-Lined Barrel, Fits AR-15 Lower Receivers, Anodized Finish, Black, Includes HUXWRX QD 556 Flash Hider LE6933-EPRII-HUX-CK