Pro-Shot Ten Inch Mopster For 12 Gauge Shotgun. Mops can be used for quick cleaning and bore lubrication. Mops are especially excellent when using oil for bore lubrication because they create foaming action that helps in the lubrication process. 12 Gauge Mopster-10" Working Length Excellent for quick cleans between rounds for trap shooters and all shotgun sport shooters Standard American Shotgun #5/16-27 thread Specifications for Pro-Shot Ten Inch Mopster For 12 Gauge Shotgun: Manufacturer: Pro-Shot Caliber: 12 Gauge Gauge: 12 Package Contents: Pro-Shot Ten Inch Mopster For 12 Gauge Shotgun The Pro-Shot Ten Inch Mopster For 12 Gauge Shotgun MPSP is a quality addition to the Pro-Shot lineup. For more great deals on Gun Bore Mops by Pro-Shot please browse our Pro-Shot Gun Cleaning Kits page. Pro-Shot Ten Inch Mopster For 12 Gauge Shotgun