Viper Red Dot 6 MOA Dot With Weaver Base by VORTEX OPTICS The Viper Red Dot's super-low mounting height makes it the perfect solution for handguns with cutout slides. The Viper gives shooters the simplicity and speed advantage of a dot sight and while co-witnessing with stock iron sights. The trade off? Nothing. The 6 MOA dot diameter gets shooters on target fast. Fully multi-coated and ultra-clear lens offers a wide and unobstructed field of view. The left-side up/down power and illumination controls are easy to access and manipulate. Recessed 1 MOA windage and elevation adjustments are super clean and protected from incidental contact and and always at the ready. It runs on a CR 2032 battery. The daylight bright red dot is easy to see and paints targets regardless of lighting conditions or background. Specs: Magnification 1 x Eye Relief Unlimited Dot Size 6 MOA Adjustment Graduation 1 MOA Max Elevation Adjustment 120 MOA Max Windage Adjustment 120 MOA Parallax Setting Parallax free Length 1.8 inches Weight 1.34 ounces Accepts Burris Fast Fire Bases