Copper/Lead Destroyer™ is super advanced – proprietary GREEN cleaning and technology for ALL firearms needing to remove COPPER & LEAD COPPER & LEAD, plus punch out some of those corrosive chlorides brought about by exploding gun powder. This is an advanced, Nose-People-Earth-friendly, BMS (Barrel Metal Safe), multi-metal & multi-contaminant rapid dissolution technology. Shooters love that it is powerful, effective, won’t etch your barrels and is safe to work with. It is a great compliment to Carbon Destroyer to super clean your firearms!