Anyone know, is PT&G making their one-piece bolts from bar stock?

I don't know, possibly they're made from a forged steel/platinum/gold alloy to justify the price...but however they make them, as long as they are one piece they should be relatively idiot proof.

Also, anyone care to talk about anodizing? The finish on scope tubes for instance is pretty amazingly durable. Does it impart any other properties to the AL beyond just the surface?

Anodizing is harder, wear resistant and doesn't oxidize...yes, it's just a surface treatment, but that's a lot on the plus side right there.

Finally, how about cyro treating of barrels to relieve stress? Real or marketing?

I'd spend the money on nitriding...it's like a reverse cryo that actually has tangible benefits.

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