Great for quick target acquisition, this scope fits onto any Weaver-style rail system thanks to an integrated mounting clamp. Has a 40mm diameter with a 30mm lens and 1x magnification, five brightness settings and unlimited eye relief. It also has a 3-MOA red dot with red or green illumination options and a large field of view. Flip caps and mounting tools included. Runs on one CR2032 battery (included). Manufacturer’s limited lifetime warranty. Length: 3.9". Weight: 7.4 oz.