UTG Deluxe Shotgun Tri-Rail Barrel Mount with Flashlight Clamping Feature Fits Most Mossberg Shotgun Barrels. Each Rail has 5 Slots.Attaches to most shotgun barrels. Easily clamps a flashlight to your gun. Includes 3 mounting rails, each with 5 slots. Enables you to add a flashlight plus 3 other accessories to your gun. Aircraft aluminum construction. All mounting hardware included. Made with military grade materials. Light weight and easy to use.