Red Laser Sight w/Weaver Mount/BlackFeatures:- Weaver Mount will easily Clamp onto Compact and Subcompact Pistols that have a Weaver Style Accessory Rail.- Fully Adjustable for Windage and Elevation.- On/Off Rear Cap Switch is Easily turned On or Off with your Trigger Finger.Specifications:- All Aluminum Construction- 635-655nm Red Laser Beam <5mw- Specially designed Weaver style mount- Standard on/off cap switch- Includes 2 AG13 Lithium type batteries and mounting tool- Dimensions (inches): 1.61Lx.1.04 Wx1.19H- Weight: 1.2 oz. with batteries