Hoppes M-Pro 7 Copper Cleaner 4 Ounce

Creates a powerful system when combined with M-Pro7 Gun Cleaner. Gun cleaner removes carbon, which typically slows the copper etching process. Copper Remover etches faster than standard ammonia based products, which allows the gun cleaner, (used intermittently in the process), to penetrate under the copper and remove it even faster. Works up to 4 times faster than standard copper removal systems. Ammonia free and virtually odorless. Non-hazardous, non-flammable, and can be air-shipped. Completely safe on bore-steel. Does not leave ammonia type crystals after use, which can draw water from the air, expand, and cause corrosion and/or microscopic stress fractures. M-Pro7 system (Gun Cleaner and Copper Remover) conditions the bore so copper does not build up as quick.