Remington Shotgun Cleaner cleans trigger groups, gas ports, choke tube threading, receivers, chambers, barrels and magazine tubes, while dissolving powder residue, fouled lubricants, burnt carbon deposits and gunk. This shotgun cleaner blasts away gummy caked-on grime from hard to reach areas such as ejectors, firing pin assemblies, trigger components and bolt recesses. Also works great on shotguns, rifles and handguns. Safe for polymers - will not damage magazines, gun stocks, camo finishes or grips.