Crimson Trace LG-350G Lasergrips S&W J-Frame Round Butt Laser Sight - Green - The LG-350G Green Lasergrips laser sight is an enhanced laser sighting option for Smith & Wesson J-Frame (round butt) Revolvers offering excellent comfort for shooters. This model features a front laser activation button and boasts over 2 hours of battery life from (4) 2016 Lithium batteries. LG-350G Green Lasergrips feature the Crimson Trace ShockStop system, which couples soft, anti-vibration material and a cushioned grip to reduce recoil while increasing shooter comfort and accuracy. User-installed in moments by replacing factory grips, the unit is completely user-adjustable for windage and elevation. Beam Intensity: 5mW Peak, 532nm, Class 3R Green Laser Adjustable For Windage And Elevation Dot Size: Approximately 0.5in At 50ft Front Instinctive Activation Button Black Grip Replacement Installs In Minutes