Directly mounts to picatinny rails with the included adapter. The Doctor standard footprint is suitable for pistols using this footprint. Commonly mounted to shotguns, carbines, and side-mounted to modern sporting rifles as secondary sight. Available in 3 MOA and 6 MOA. *The TSR1 red dot is compatible with the Glock-branded M.O.S. pistol mounting plate #01. Features FULLY MULTI-COATED Effectively reduces reflected light and increases the transmission of light giving you a brighter image than normal single coated lenses. MOTION SENSOR Built in motion detector automatically wakes the product up from the sleep mode when a motion is detected. EXTENDED BATTERY LIFE Offers 50,000 hours battery life at medium illumination setting.