I'm a long way from untangling what ITAR really says, but from a quick skim, I gather that ITAR only regulates items in international trade. There is no constitutional right to engage in international trade, so the regulations can be pretty tight.
If that's correct, your local gunsmith does not need to register or pay the fee unless he/she is doing work that will be shipped to another country. So, undoubtedly, the major gun manufacturers will want to register so they can export. But someone threading a barrel for the local trade? I don't think so.
I'll keep researching and post anything useful that I find.
That's how I read it.
Dave
