Bravo Company, MCMR Rail Panel Kit, M-LOK Compatible, 5.5, 5 pack, Flat Dark Earth Perfect fit for your BCM MCMR Handguard Measurements: Length 5.550 Width 0.625 Thickness 0.100 Bravo Company's BCM MCMR 5.5 Rail Panel Kit is a perfect fit for your BCM MCMR Handguard. Its ultra-slim and radiused surface allows a round handguard feeling from an Octagonal profile. Its aggressive non-slip or non-reflective surface is ventilated for cooling. Can be installed in either direction and can be cut to any length depending on the user's requirements. Made in the USA of a high-strength polymer material. Each kit contains five panel strips.