Gunsmithing Who has the best pricing (and quality) for threading 3 AI barrels?

Qualified armorer for what? AI?

I'm not sure barrel threading really requires an AI qualified armorer.
You do you. I’m just offering up a suggestion. I have no doubt if you go with LRI the results will be excellent.

I agree with your sentiment, 175/ barrel is a rip-off though. That’s what all 3 should cost IMHO.