Initially, all he has to do is legislation like the one he previously, per Lott, that restricts the sale of firearms within five or ten miles of a school or park. Combine that with an large tax on ammunition and he’s 90% of the way there without “banning” a thing.
Indeed, passing new “fees” and “taxes” on weapons and ammunition would make them prohibitively pricey. Then, banning their sale within X number of miles of a school would put numerous gun dealers (pawn shops, gun shows) out of business. But that would only mean that the Black Market in weapons would thrive.
If “Great Leader” really wants to get rid of guns, he’d have to order their confiscation (he’d probably offer some sort of buy-back first) of all weapons. Would he do that? Sure he would, if he thought he’d get away with it.
I would imagine, however, that there are thousands upon thousands of people, like me, who would not answer the knock at the door, or would not willingly hand over our only means of self defense, and/or would not be silent — nor particularly peaceful (if push came to shove).
Like Heston, I would say (without bravado, but on principle) “from my cold, dead hands.”