This is a Bravo Company Rail Panel known as the BCM Gunfighter, model BCM-KMR-RP-FDE-5.
Bravo Company's BCM KeyMod Rail Panel Kit" 5.5" (5 pack)" is made to fit ALL KeyMod mounting surfaces with 7 consecutive KeyMod slots. Its ultra-slim and radiused surface allows a "round" handguard feeling from an Octagonal profile. It has an aggressive non-slip" non-reflective surface and is ventilated for cooling. The measurements are-Length 5.550"" Width 0.625" and Thickness 0.100". They can be cut to any length depending on the user's requirements. Made in the USA with a high-strength polymer material.
Features:
Bi-directional. Locking tabs on either end depending which direction they are installed;Each Kit contains 5 matching color KeyMod Panel Strips