The AR15 Riser Mount with a quick release lever is designed for mounting the Razor red dot sight onto a flattop style AR-15 rifle. When used in conjunction with the Picatinny clamp included with the Razor, this mount positions the red dot of the Razor in the lower third of the field of view when co-witnessed with the iron sights. Vortex Razor Red Dot AR15 Riser Mount with Quick-Release Lever MPN MT-5108