I bought one of those garbage Chinese US cleaners. It blotched the finish on a colt Bolt carrier. My experience with that damned thing was disappointing to say the least. It does take some carbon fouling off of silencer mounts... but doesn't do a good enough job that you don't end up scraping and wire brushing 25% of the carbon anyway.
I suppose there's guys who have a better system of cleaning this way, but I was unimpressed to say the least.
"You people have too much time on your hands." - scottryan
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