The Bravo Company M-LOK Rail Cover is he perfect fit for your BCMA(R) MCMR Handguard. Ultra-slim and radiused surface to allows a round handguard feeling, from an Octagonal profile. FeaturesAggressive Non-Slip or Non-Reflective surface.Ventilated for cooling.Can be installed in either direction.Measurements: Length 5.550 , Width 0.625 , Thickness 0.100Can be cut to any length, depending on users requirements.Made in the U.S.A. of a high-strength polymer material.Each Kit contains five panel strips.