The LS-870 and LS-250 Lasersaddle is a feature-packed laser sighting solution for Remington 870 and Tac-14 (LS-870) and Mossberg 500, 590, & 590 Shockwave (LS-250) shotguns in 12 gauge only. Attaching seamlessly to the receiver, they provide an ambidextrous laser activation pad for instant targeting with a powerful 5mW red or green laser. As with all Crimson Trace laser sights, the Lasersaddle is user-adjustable for windage and elevation. The Lasersaddle features a Master On/Off Switch for completely powering down the system. These models provide 3 Hours of battery life with two provided CR2032 or 4 CR2016 batteries. Does not fit 20 gauge or .410 Bore.