they could just order it from another state and have it shipped right to his door.
There was a time in the US when you could do that. It ended in 1968
For over fourty years, direct mail order sales of firearms has been against Federal Law. 40 years!
Hope your anti friend ponys up for the drinks. Imagine, not knowing something like that has been illegal for over 40 years! Wonder what else he doesn't know?
You might want to tell him about the drug laws passed back then, and more recently. Or maybe tell him about the fact that we landed men on the moon!