Gun cleaning foam with indicator.
C4G foam is gun cleaner developed for those who seek gun care on a proffesional level. Product forms dense expanding foam that fills all corners of the barrel. C4G foam effectively dissolves lead, copper and gun powder residues. It actively cleans rust and forms an anti-corrosion film. Another invaluable feature is indication of fouling, the foam change color to blue in presence of gunshot residue.