Improve your shot and a sure life saver for home defense. All Aluminum Alloy body unlike imitations built for airsoft. For pistols of all caliber.Specification Specifications:For: Picatinny; Mil-Spec; Weaver Style Rails (w/ minimum rail length of 1.75")Battery Type: 357 (2)Accuracy: User-adjusted for windage & elevation Laser Operating Temperature: 10°F - 130°FWavelength: 635nm (red/orange)Power Output: 5mWSpot Size: 5/16" @ 7 Yds; 3/4" @ 25 Yds