BCM MCMR-9 (M-LOK® Compatible* Modular Rail) Featuring the same industry leading barrel nut and lock up design as originally introduced on BCM’s evolutionary KMR handguard, the MCMR Series of handguards gives the shooter modularity in the M-LOK® platform. This proprietary patented mounting system (US Patent 8904691), includes a mechanical index to the 12:00 rail …
