The award-winning G-Series laser sights offer an even more compact frame application than traditional Lasergrips maintaining your subcompact-sized GLOCKs lightweight configuration. Engineered with Crimson Traces 'instinctive activation' the laser sight is engaged from the rear with your natural firing grip. Crimson Trace G-Series Lasergrips have been recognized with two Golden Bullseye Awards from the National Rifle Association and a High-Tech Product of the Year Award from the Firearms Industry Academy of Excellence. No other laser sight has won more awards. - Platform Lasergrips® - Material Polymer - Attachment Grip Attachment - Activation Location Rear Activation - Sighting Factory Sighted at 50' - Free Batteries For Life Yes - Battery Type Two #2032 Batteries - Laser Battery Life Over Four Hours - Laser Output 5mW Red Laser - Activation Mode Pressure Activated - Laser Visibility Approx .5 Inch Diameter at 50 Feet - Wrench Size 0.05 - User Adjustable Windage and Elevation - Finish Polymer Grip with Rubber Overmold Activation Pad - Installation User Installed - Warranty Three Year Full Warranty - Color Black - Dot Size Approx. 0.50 at 50'