Bravo Company MFG (BCM) MK2 Carbine 11.5" Upper Receiver Group - 5.56 NATO, MCMR-10
This BCM MK2 11.5" carbine upper receiver group is chambered in 5.56 NATO and built around BCM’s patented MK2 upper receiver design, featuring an integrated gas expansion chamber and dual rear vents to help redirect gas away from the shooter. The MK2 receiver is paired with an MCMR-10 (M-LOK) handguard and a flat-top, T-marked Picatinny rail.
The 11.5" government-profile barrel uses Mil-Spec steel (certified Mil-B-11595E), a chrome-lined bore and chamber, and a manganese phosphate finish. Additional factory features include M4 feed ramps, a USGI 1/7 twist rate, and HPT/MPI barrel inspection. This upper is configured with a BCM-marked bolt carrier group, a charging handle, and an installed muzzle device.