BCM M4 Upper Receiver Assembly
BCM M4 Upper receiver assembly.
Built and fully assembled to correct mil-specs.
Designed for barrels w/ M4 barrel extensions.
Mil-std 1913 Picatinny top rail.
Laser etched T-Markings on rail.
Includes forward assist and ejection port cover.
Dry film lube on interior bore.
Bravo Company Manufacturing #BCM4-UR-M4
Out of stock