Aught Six, not to be nitpicky but none of that is correct.
I checked a few sections of the U.S. Code. Looks like I had my facts wrong. I'm originally from Maryland, so I may confusing federal law with state law. But you gave the best advice: to check the law carefully. I would contact the State Police. By the way, Maryland hasno RKBA in the state Constitution.
I was a little rough, but I thought he was risking serious trouble. I certainly don't want any young men doing something that they could regret for the rest of their lives.