I was amused at this, though:
This does not require an absolute ban on firearms. In the post-repeal world that we envision, some people will possess guns: hunters and sportsmen, law enforcement officers, the military, those who require firearms for morally reasonable purposes. Make no mistake, however: The world we envision is a world with far fewer guns, a world in which no one has a right to own one.
In other words, all the most powerful and dangerous guns will still be available to those willing to put up with the cost and complications of getting them, or willing to bypass these complications through the black market. This is the America gun control proposal: Make gun control laws easier, while not doing anything practical about guns.
It should be noted, incidentally, that the editors are mistaken if they think repealing the second amendment will lead to "a world in which no one has a right to own" a gun. The government can't arbitrarily alienate property, so guns already out and about will fall under standard property rights. What is more, forty-three states have gun right provisions in their constitutions: mere repeal of the second amendment will leave these unaffected and still operative. Repeal of the second amendment would make some stricter gun-sale laws possible in a limited way under the interstate commerce clause, but that's about it.