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I'm there with you.

Most (not all, like in 871JZ's case) of these nitrided bolts are 9130.  Disadvantage there is that the heat treatment for 9130 seems to be especially critical, and the Nitride process has the potential to completely screw up the heat treat.  

During the panic of '12-'13 there were lots of reports here of 9130 bolts broken, often times with very few rounds fired through them.  They often broke at the bolt lugs vs the cam pin hole, and quite often broke multiple lugs at the same time.  

I'm a fan of the tried and true C158, preferably from a known source, such as Colt or BCM.

Reality is that cleaning the bolts and the BCG really isn't that tough to begin with.

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You have one I assume? How do you like it? Any issues with it at all?

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I'm curious about these chemical vapor deposition type coatings, is the Cryptic Mystic Black essentially the same as the ARFCOM DLC?