The Midwest Aimpoint T1 and T2 Lower 1/3 QD Mount puts your iron sights in the lower 1/3rd of the Aimpoint optic. It has a smooth functioning QD lever and does not require any tools to adjust. Fits Picatinny rails. The mount is precision machined for great return to zero after being removed from the rail. Built from 6061 aluminum and hard coat anodized black.