In a republic form of government, the laws reflect the will of the people, so I guess that if around 67% of America agrees (In reality, I know that it's 67% of congress, and that doesn't necessarily reflect 67% of america) that guns should be banned, I'd be fine with that amendment being passed.
The main reason that I say this is that I'm a big supporter of states rights, and any power of this size that is given tot he federal government should be done on an amendment level, which is much more difficult than a bullshit executive decree.