Hoppe's No. 9 Foaming Bore Cleaner, 12 oz - 908

This foaming bore cleaner dissolves and removes copper buildup and powder residue from firearm barrels without requiring brushing or mechanical scrubbing. The orange foam changes color—turning blue to indicate copper removal or black to indicate powder removal—providing a visual indicator of cleaning effectiveness. Supplied as a 12 oz aerosol spray bottle.