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KG-12 was developed specifically to clean the copper fouling from large bore military weapons. KG-12 provides professional shooters, gunsmiths, armorers, hunters and other firearm enthusiasts with a product that will remove the toughest copper fouling without damaging the bore. Unlike ammonia-based products, there is no need to neutralize KG-12 or to remove it quickly because KG-12 contains no ammonia.
Posted by Gord on 5th May 2015
This is, without a doubt, the fastest and most complete copper remover I've ever used. I own a couple of rifles that copper foul badly and quickly. KG-12 makes cleaning these barrels very quick and easy. I'll probably shoot these rifles more often now. You should invest in cleaning jags made out of anything but brass, for obvious reasons. I use nylon brushes to apply KG-12 to the bores.