The EXPS3 Holographic Weapon Sight is a lightweight, non-magnifying, optical sight designed for close to mid-range engagements. It provides very fast target acquisition and engagement at short ranges while providing aiming capability out to 300 meters equal to or better than iron sights. The EXPS3 features easy-to-adjust side buttons, a quick-detach lever, and a transversely-mounted lithium CR123A battery. The increased height of the EXPS creates a lower 1/3 cowitness with iron sights.