Thread: KG 12 copper remover

I use the MPro-7 line of products. I have always found them really good and I can normally clear out a few hundred rounds of copper down to the steel in a couple of runs through. I let the copper remover sit for about an hour and then clear it with gun cleaner and then reapply copper remover.

I agree with the borescope, often you can find things that aren't really an issue or get upset that your brand new barrels rifling has tooling marks in it etc.