Specifications Construction: Metal Laser: Green Maximum Output Power: 5-20Mw Wavelength: 532Nm Length: 151 Mm Weight: 227G Rail Compatibility: 20Mm Picatinny/Weaver Color: Black Features Incredibly Tough Tempered Metal Alloy Manufacturing Proves To Outlast And Endure In The Field Against The Elements And Debris. Integrated 20Mm Picatinny/Weaver Rail For Mounting Of Dot Sights Or Other Accessories Adjustable For Windage And Elevation Two Modes For Powering On: Push Button Or Pressure Switch Mounts To Any Surface With 20Mm Picatinny/Weaver Rails Enhanced Target Acquisition Perfect For Close Quarters Combat