Tetra Gun Copper Solvent, 8-Ounce Quality and product tested for the highest results Trusted by users all over the world Keep your firearm in tip top Condition with tetra Dissolves Copper, Lead, Plastic, and residue Does not Etch the barrel Dissolves Copper, Lead, Plastic, and residue Does not Etch the barrel Helps condition your bore so less fouling occurs during future use