The LS-250 Lasersaddle is a feature-packed laser sighting solution for Mossberg Shockwave, 500 and 590 shotguns. Attaching seamlessly to the receiver, the LS-250 provides multiple ambidextrous laser activation pad points for instant targeting with a powerful 5mW 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.Crimson Trace also extends one free set of batteries a year for life when you register you Crimson Trace product on the manufacturers website.Note: Fits Mossberg 500, 590 & 590 Shockwave in 12 and 20 Gauge only. Models must have receiver that is drilled and tapped. Does not fit .410 Bore.