This fully adjustable machined metal front and rear sighting system for vent-rib shotguns features a unique mounting system requiring no tape and no magnets for a solid lock on the rib! The micro-adjustable rear sight allows for both windage and elevation adjustments.FEATURES:? Truglo's ultimate turkey sight.? All steel construction.? Securely mounts to your rib without tape or magnets.? Full windage and elevation adjustment.? Front diameter is .029"; rear diameter is .035".? Endorsed by the National Wild Turkey Federation.Fits: Most Mossberg Weatherby and Winchester (excluding SX3) models