FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black

Fightlite's groundbreaking MCRA(R) (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.Once installed, the patented MCRA(R) upper receiver system can be user-configured in seconds without tools to adapt to virtually any mission profile. Specifically designed for r