I don't see the point in trying to ban guns in America, it would be like trying to ban stupidity on Facebook. Guns are just too prevalent among the populace.
Even when you talk about banning the use of high powered rifles and assault rifles, I still fail to see how it will help. Australia has a total ban on these deadlier rifles (even bans on airsoft guns that look exactly like their real counterparts, for fear of being used in burglaries), but that didn't stop people from obtaining hand guns and murdering people with those (until those were restricted/banned too). Even so, our bans only worked (as in the reclamation being realistic; gun crime is falling, but was falling before the bans anyway) because we had such low gun ownership.