Oh, thats weird. I dont know if mine came with all black or if I just shot it a lot before ever taking it apart haha. I only remember them being black.I just looked it up, you are right one stainless the rest are aluminum. They used two different colors on the aluminum baffles, thats why I was thinking they were ti.
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Soak it in penetrating oilcan`t get my front cap off my ARC 22 can, it walked a few threads loose during a shoot. when I got home tried to get off and no luck.ran it hot again with bunch of rounds then hit with freon to quick cool and still no luck. Hard to get those things off since u have to use flat pin wrenches