Yes. Action, bolt and barrel all nitrided. But they totally screwed up the chambering on the barrel so that got shipped back. Complete shitshow of a build but I've moved on. I completely agree with you that this industry sucks, is full of bro science, shoddy craftsmanship, outright incompetence and marketeering BS.
Also, many researchers have performed controlled experiments to measure the material properties of nitrided steel, including wear properties. This is published in peer reviewed journals. You are single handedly dismissing long established material science fundamentals because....?
You might caveat your position by stating that nitrided steel wears much less than untreated steel, or not perceivably in a firearm application. But it does wear, and you can measure it, as have many engineers and scientists. I'm not a material scientist, which is why I did 10 seconds of research to satisfy my doubts about miracle nitride properties.