LaserMax Lightning Universal Rail Mounted Green Laser With GripSense Technology Matte Black Housing The LaserMax Lightning Universal Rail mounted laser is designed to mount to any firearm with either a weaver or picatinny rail. 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 Laser (Matte Black) Specifications and Features: 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 Note: This listing is for the Laser ONLY, the firearm is NOT included.