In the call to the ATF she commented that I should double check with Customs and Border Patroltoo. She said they are the ones that could confiscate or impound upon arrival.
I went to the website, and found a messaging system that I used to ask the questions.
Says 7-10 days to get a response, so I will update when I receive.

So, I think I’ve covered everything… but I’m still anxious that something could go wrong. 😬