The intrafuse AR riser mount is a lightweight mount that lets you lift your optics to see over the front sight. The side locking nuts are made to be used without the need to carry any extra tools. Made from the highest strength composite this mount is tough without adding unneeded weight. Specifications: - designed for use on an AR Flattop using a Picatinny rail - length: 5.25 inch - manufactured from high strength composite - 100% U.S. Made - black.