LPA Adjustable Shotgun Rear Sight Screw Down White Dot Ring Black. This rear Sight works on most Famous brands of Semi-Auto and Pump Shotguns such as Beretta Benelli Mossberg Browning Winchester Ithaca etc... with barrel diameters ranging from .819in to .842in for standard shotguns and .858in to .882in for heavier gauges. Center-to-center mounting hole distance: 1.7in Specifications for LPA Adjustable Rear Shotgun Sights - Screw Down: Manufacturer: LPA Color: Black Attachment Type: Screw Gun Make: Ithaca Winchester Benelli Mossberg Browning Beretta Condition: New Gun Type: Shotgun Package Contents: LPA Adjustable Rear Shotgun Sights - Screw Down LPA BAR11R+D2: Adjustable Shotgun Rear Sight Screw Down White Dot Ring Black