A perfect option for handguns due to its super-low mounting height, the Vortex Viper Red Dot Sight features a 6 MOA dot that gets you on the target fast. The left-side up/down power and illumination controls are easy to access. Recessed 1 MOA windage and elevation adjustments are super clean, protected from incidental contact. It runs on one CR 2032 battery (included). Also included is a slip over sight cover, picatinny mount, and T-15 Torx wrench to mount the red dot on the picatinny mount. Also note that thsi will work with the Burris FastFire base for specific firearm models.