Has anyone tried cleaning barrels with one.I was just wondering if it would remove copper and carbon fouling.I know that the ones made by L&R for weapons cleaning sell for almost $7000 bucks.But i have seen some that would clean half a barrel then flip it around and do the other half,used for $500 to $800 bucks at some equipment sales auctions.I was just wondering if we have anyone who has tried one.Maybe a law enforcement or military armorer. Thanks Rudy