Can any machine shop work on antiques

[trevj]

That’s the key right there. My friends machine shop can make a part for the space shuttle but he doesn’t have a firearms licence to work on any firearms. If I bring in a part, he’ll work on it ok but he won’t want me to bring a whole firearm into his shop.

Yeah, this, too.

Parts, no big deal, any changes to the serialized item that IS the gun, there are other rules around!

It's a silly, and much more, stupid PITA, but if you fall afoul of the rules (laws), expect to get whacked upside the head with a reality check!