This product cleans and degreases firearm actions without disassembly, leaving no residue. The high pressure cleaning solvent contained in this product effectively cleans all moving metal parts, triggers, ejectors, and extractors on firearms. The extension tube which inserts into the valve head produces a high pressure spray that allows the solvent to penetrate and remove soluble as well as insoluble particles from the firearm. It is excellent for use on rifles, shotguns, and pistols. Crud Buster is safe for use on polymer firearms, and is for firearms use only.