TruGlo’s Pro Magnum Gobble-Dot is an adjustable sight that will have you hitting right on target. It securely mounts to your rib without tape or magnets and is fully windage and elevation adjustable. Endorsed by the National Wild Turkey Federation. *Note- Designed ONLY to be installed on a shotgun barrel with a ventilated or solid rib design. Fits- Mossberg 500, 835, 9200; Remington SP-10; Weatherby Orion and Winchester 1200, 1300, 1400, Super X2 shotguns.