The Hera Arms IRS is a modern designed, quad-rail handguard made from high-quality aluminum and is build to handle the hardest use and abuse of tactical and competitive shooting. It comes with his own barrel nut and is clamp mounted with three (3) screws for additional strength. The anti-turn millings prevent turning even at the hardest use. This 15" model is compatible with your AR-10 and has a black hardcoat anodized finish.