The C4 Carbon Remover"s proprietary non-flamable, non-hazardous and 100% biodegradable formulation relies on a sophisticated blend of surfactants, penetrants, suspending agents and chemical action to remove stubborn carbon deposits. Ideal for rifle barrels, bolt faces, flash suppressors, compensators, silencers, chamber throats, revolver cylinders, gas pistons and any other place extreme carbon fouling is found.