Remington Shotgun Cleaner cleans and degreases trigger groups, choke tube threading, semi-auto gas ports, receivers and magazine tubes, chambers and barrels, while dissolving powder residue, fouled lubricants, burnt carbon deposits and gunk. The formula blasts away gummy caked-on grime from hard to reach areas such as ejectors, firing pin assemblies, trigger components and bolt recesses, producing a clean, dry surface without residue. Safe for polymers - will not damage magazines, gun stocks, camo finishes or grips. Also works great on handguns and rifles.