LaserMax Lightning Universal Rail Mounted Green Laser %u200BFeatures: This universal rail mounting system is ideal for firearms which have at least 1 of rail space. The new GripSense technology represents the newest generation of laser activation technology by simplifying the activation process. A simple motion sensor is used in order to detect when you hand has engaged on the pistol grip in order to activate the laser immediately. LaserMax Lightning Universal Rail Mounted Green Laser %u200BSpecifications: LaserMax GS-LTN-G Green Laser Universal Rail Mounted Weaver/Picatinny Rail Compatible Needs at least 1 of Rail Space Green Laser 520/650 NM Wavelength Accurate to within 1 POI at 10 Yards 5 Hours of Battery Life 5 Year Manufacturer Warranty GripSense Activation senses the users grip within the detection zone and activates the sight Dual activation capable with either GripSense or controlled push button Does not alter your shooting grip Easily programmable for steady or high-vis pulsed beam External Battery access hatch with tool-less entry Water resistant design Matte Black Housing