Hoppe's No. 9 Foaming Bore Cleaner 3 oz - 907

This aerosol foam cleaner dissolves and removes copper buildup and powder residue from firearm bores without requiring brushing or mechanical scrubbing. The formula features a color-change indicator that turns blue for copper removal or black for powder removal, allowing users to visually confirm cleaning effectiveness. The 3 oz spray can is designed for use after allowing the barrel to cool, with a 15-30 minute wait time for the foam to work.