NcStar's AR15 KeyMod Free-Float Handguard is low profile and features anodized aluminum construction for light weight and durability. This octagon-shaped handguard has seven sides of KeyMod slots, and a Picatinny top rail at AR15 receiver height with laser-engraved T-Slot numbers. It includes: barrel nut, handguard adapter insert, short and medium KeyMod to Picatinny accessory rails, and main handguard tube. Installation requires a low profile gas block and an AR15 Barrel Nut Wrench. It has a black anodized finish. This model is 13" long. It weighs 13.4 oz. with both accessory rails installed, and 10.9 oz without rails.