It’s actually worth going to the site to read this. It’s on a forum and is complete with step by step pictures.
Could be a winter project for someone with a couple of tools in their garage.
If you make one, I want to be the second or third person to fire it.
(Or ninth, tenth - whatever. Not first.)
I would have fired it straight-up, first time.
His barrel was thicker than normal, and he was using a stock bolt from the Romanian parts kit. As long as the bore looked clear and his firing pin protrusion was within spec, I’d have fired it without hesitation.
What he made had no direct involvement with chamber pressures.
Awesome!
Very cool!