FightLite Industries MCR556DFRM Dual Feed Complete Upper Receiver 5.56x45mm 16.25" Barrel M-LOK Handguard

The FightLite Industries MCR556DFRM 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. The MIL-Spec MCR 5.56 DFR takes the standard MCR technology to a whole new level and includes all of the accessory items that are included in the standard MCR government product along with Dry Film Lubric