Mine was shipped bare, then got cerakoted, then had the cerakote stripped off and nitrided. My SAUM bolt was nitrided from the beginning. My standard bolt is more of a grey color now due to the number of cycles I have put on it, but the SAUM bolt is still quite dark.
I know there's not a ton of them running around PRS matches, but it's rare for me to go to a match without seeing another one, and often they're in my squad. That probably has more to do with the number of friends and teammates I have that run them than anything else, though.
I've never had trigger issues with my Timney CE, and I only get the hitch when running the bolt slow. If I am running it like I normnally do in a match or in practice, I definitely don't notice it.