The EXPS3 Holographic Weapons Sight is a holographic sight designed to enhance speed, accuracy, and range. The EXPS3 provides a large, open, and clear glass viewing window, as well as a diode laser holographic reticle image and 5 brightness settings to adjust for various environmental conditions. It offers a unique sight picture that allows the shooter to keep both eyes open and target focused without the need for adjusting eye position. Also comes with quick detach lever for Picatinny Rails.