LPA White Dot Front Sight Ramp Rib Style Black. .. Tactical sight sets fit barrel diameters ranging from .819in to .842in for standard shotguns and .858in to 882in for heavier gauges. Tactical Rib Set fits ventilated ribs from 6mm to 9mm wide. Easily attached by means of screws on each side locking the sight onto the rib. Preferred to use with SKU BAR11R Specifications for LPA Front Shotgun Ramped Sights - Screw-in: Manufacturer: LPA Front Sight Color: White Dot Color: Black Attachment Type: Screw Gun Make: Ithaca Winchester Benelli Mossberg Browning Beretta Gun Type: Shotgun Package Contents: LPA Front Shotgun Ramped Sights - Screw-in LPA SG7+M1B: White Dot Front Sight Ramp Rib Style Black