Some slight box crush but contents are new. Pleased see photos and feel free to ask questions. The Crimson Trace LS-250G is a receiver-mounted green laser sighting module designed specifically for certain Mossberg shotguns. It’s part of Crimson Trace’s LaserSaddleT series and provides a visible aiming dot that helps with faster target acquisition. Green laser (5 mW, 532 nm) – bright, visible aiming point. Receiver saddle mount – sits on top of the shotgun’s receiver without interfering with side saddles or other accessories. Ambidextrous activation pads – multiple contact points for intuitive on/off pressure activation. Adjustable windage & elevation – user-adjustable to align the laser with the shotgun’s point of impact. Master On/Off switch – fully powers down for storage or travel. Battery life 3 hours – uses four CR2016 batteries (included). Dot size 0.50? At 50 ft – standard visible dot for aiming. Mossberg 500, 590 & 590 Shockwave (12 ga and 20 ga) with drilled & tapped receiver. Does not fit. 410 bore, 590M, 500 ATP, or receivers without proper holes. ? What It Is. This is not a rail accessory like a Picatinny laser, but a saddle-style module that bolts to the top of the shotgun receiver. It sits low, keeps the shotgun accessible, and lets you activate the laser via pressure pads while holding the forend. ? Typical Use Cases. Quick target acquisition in low light. Home defense applications (visual aiming aid). Training or range work.