Crimson Trace Green Lasergrips for Smith & Wesson J-Frame Round Butt (Extended Grip) The LG-305G green laser sight for Smith & Wesson J-Frame combines Crimson Trace's celebrated Lasergrips platform with the visible advantages of green laser technology. Using the smallest laser green laser diode available, the LG-305G emits a powerful green beam yet still provides over two hours of run time on two 2032 batteries. This model features an extended grip length over stock grips and is preferred by many shooters. The Lasergrips are manufactured with a recoil-absorbing rubber overmold material over a polymer base. Specifications: - Platform: Lasergrips - Material: Rubber - Attachment Grip: Replacement - Activation Location: Front Activation - Sighting: Factory Sighted at 50' - Master On/Off Switch: Yes - Battery Type: Two #2032 Batteries - Laser Battery Life: Over Two Hours - Laser Output: 5mW Green Laser - Activation Mode: Pressure Activated - Laser Visibility: Approx .5 Inch Diameter at 50 Feet - Wrench Size: 0.028 - User Adjustable: Windage and Elevation - Finish: Rubber Overmold Grip - Installation: User Installed - Color: Black - Dot Size: Approx. 0.50" at 50'