The LS-250G Lasersaddle? is a feature-packed laser sighting solution for Mossberg 500, 590, & 590 Shockwave 12 Gauge & 20 Gauge Shotguns. Attaching seamlessly to the receiver, the LS-250 provides multiple ambidextrous laser activation pad points for instant targeting with a powerful 5mW red laser. As with all Crimson Trace laser sights, the LS-250 is user-adjustable for windage and elevation. The LS-250 features a Master On/Off Switch for completely powering down the system. This model provides 3 Hours of battery life with two provided CR2032 batteries.Fits Mossberg 500, 590 & 590 Shockwave in 12 Gauge and 20 Gauge only. Models must have receiver that is drilled and tapped. Does not fit .410 Bore. Features: Product Platform: Lasersaddle Material: Polymer Color: Black Master On/Off Switch: Yes Battery Type: Two #2032 Batteries Installation: User Installed Laser Battery Life: 3 Hours Activation Mode: Pressure Activated Sighting: Factory Sighted at 50' User Adjustable: Windage and Elevation Warranty: Three Year Full Warranty Dot Size: Approx. 0.50" at 50'