The LS-250 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 4 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. Does not fit Mossberg 500 ATP with provided screws.