13.7" Ultra Lite MLOK Hand Guard (Includes Barrel Nut & Hardware). Made of 6061-T6 aluminum and anodized black per mil-spec MIL-A-8625F, TYPE III, CLASS 2-5. 13.7": Hand guard weighs 9.1 ounces. Barrel nut and hardware weigh 1.3 ounces. 7": Hand guard weighs 5.4 ounces. Barrel nut and hardware weigh and additional 1.3 ounces. 10": Hand guard weighs 6.9 ounces. Barrel nut and hardware weigh an additional 1.3 ounces. 15": Hand guard weighs 9.8 ounces. Barrel nut and hardware weigh an additional 1.3 ounces. Mfg: Sharps Bros