FightLite MCR060MS MCR Dual Feed Upper, 12.5" Barrel, 5.56 NATO, Black

FightLite FightLite Mission Configurable Rifle Dual-Feed Upper Receiver Assembly FightLite's groundbreaking MCR (Mission Configurable Rifle) belt-fed upper receiver assembly is designed to interchange with standard AR/M4 type uppers and readily fits any MIL-Spec lower receiver without permanent modification to the host lower, and is rearward compatible to AR15/M16 models produced as early as 1963. Features: Short-Stroke Gas Piston Operation Dual-Feed-Accepts All AR15/M16 Magazines & M27 Linked Ammunition Precision Machined 7075-T6 Billet Upper Receiver Full-Auto Bolt Carrier MIL-STD 1913 Rail at 12 o'clock M-Lok at 3, 6 & 9