Designed specifically for the FN SCAR” but suitable for any MIL-STD 1913 rail where the thinnest profile cover is desired. The simple one-piece positive locking system keeps the panel anywhere on the rail” until you decide to move it. Aggressive trademark Binary texture offers a non-slip surface” wet or dry. Injection molded from heat and impact modified polymer. This is a 4.12″ long panel.