Remington Shotgun Cleaner cleans trigger groups, gas ports, choke tube threading, receivers, chambers, barrels, and magazine tubes. Dissolves powder residue, fouled lubricants, burnt carbon deposits and gunk. Blasts away gummy caked-on grime from hard-to-reach areas such as ejectors, firing pin assemblies, trigger components and bolt recesses. FeaturesCleans: Trigger groupsChoke tube threadsSemi-auto gas portsReceiver and magazine tubesChambers & barrels