Viridian's Essential laser sight is specifically designed for the everyday conceal and carry owner. This model specific, trigger guard mounted, laser sight offers the most powerful g laser legally available, delivering rapid target acquisition when you need it most.FeaturesEasy installation onto the trigger guard of your pistolAmbidextrous on/off button with 5 min auto shut offGreen light - Up to 100 yard range in daylight and 2 miles at nightRed light - Up to 25 yard range in daylight and 1 mile at nightConstant laser with 6 + hours battery lifeEasy windage and elevation adjustment Note: For Glock models, only fits Gen 3, 4, and 5 models listed DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.