Quick view FIGHTLITE INDUSTRIES Fightlite Industries MCR556DFR 5.56x45mm NATO 16.25" 7075-T6 Aluminum MIL-STD 1913 Rail Handguard $7,545.99 $6,599.99 The 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... Add to Cart