Official TacFire Full size Medium prodile 5 5/8" length riser mount is constructed of Lightweight T6 6061 Aircraft grade aluminum for strength & durability. It features a see-through design which allows for use with iron sights. The 3/4 inch riser is designed to lift your mounting surface to allow sight clearance over your front sights. It accepts all Picatinny/Weaver Optics, Red Dots, and other tactical accessories.