I think this would only affect the re-importation of US-made weapons that were given by the US to allies. Basically means M1 Garands and M1 Carbines. Doesn’t matter though. If Obama thinks he can do this by executive order, I’m sure gun registration or confiscation by executive fiat isn’t far behind.
He wants to ban the import because they are popular with patriots instead of gangbangers.
One of the alphabet agencies controls the importation paperwork. Basically all Obastard has to do is to tell the head of that agency to deny all importation requests.