Non-toxic copper removing foaming gun bore cleaner contains no ammonia or corrosive agents Quickly & effectively dissloves and removes copper and other fouling residue. Excellent results without brushing or other mechanical cleaning. Protects against corrosion. This unique formula contains no ammonia and is non-toxic, non-corrosive and odorless Simply spray Knockout into the chamber until it comes out of the end of the barrel. Let stand 15 minutes and wipe out with a rod and patches Foaming action gets into riffling For use with all firearms Leaves behind a protective film to reduce accumulations 3 oz can