The Primary Arms Absolute Cowitness Micro Dot Riser allows for an absolute cowitness on AR15 and similar platforms when combined with any Primary Arms Micro Dot, as well as many other standard Micro dot designs. When looking down the iron sights, the red dot will be placed in the middle of the Micro dot’s scope tube. The light weight design, constructed of anodized aluminum, is easy to install. The riser features a 3-year limited warranty.