Pro-Shot's Copper Solvent IV tackles copper, powder, and primer fouling restoring accuracy and providing rust protection for firearm. Their synthetic formula uses activated positively charged ions that bond and release coppy and its oxides from the surface of the bore to provide a superior clean. This solvent also soaks into porous metal to inhibit the onset of rust and corrosion. Pro-Shot's innovative formula is also a smarter, healthier, and environmentally concious way to clean than the old methods of throwing harsh amonia-based chemicals at copper fouling. Features Proprietary addtives to remove copper, powder, and primer fouling Rust and corrosion inhibitors Smarter, healthier, and more environmentally concious than amonia-based solvents No offensive odor