FightLite MCR Dual Feed Upper Receiver Assembly, 5.56 NATO, 12.5" M-LOK, Manganese Phosphate - MCR-060MS

This belt-fed upper receiver assembly is designed to interchange with standard AR-15 lower receivers without permanent modification and is compatible with AR15/M16 models. The 12.5" quick-change barrel features a 1/2x28 threaded muzzle, M-LOK handguard mounting, and adjustable sight set. The user-configurable design allows tool-free adaptation to various mission profiles and includes a buffer, spacer, bolt catch, adapter, compensator, and 100 M27 links.