And it's not as simple as "Let's just not do anything about it" either.
I'm a brit, we don't have a written constitution, just a nebulous bunch of laws, edicts and bills over the years. So I'm probably a bit callous in saying this but; it's an amendment, it's a change to the constitution. If it can be changed once, twice, nay twenty seven times, then it can changed just one more time. Just gotta get over treating a bunch of two hundred year old laws as sacred texts.
As for taking the guns away, I'm to understand getting a gun legally means registering, which means there should be a handy list of everyone who owns a gun and what guns. Then all you have left instead of the current mix of legal guns, illegal guns, and legal guns used for illegal purposes, is just illegal guns. With no ready access to weapons at the shop on the street corner, there's a diminishment in the amount criminals can have access to as well. Main supply of guns in the country becomes police and armed forces, and they're keeping much better track of guns than the shop down the street and the bumbling office worker who was just sold one. The barrier for entry to gun possession shoots right up. Crimes of passion using guns becomes a lot harder, and I'd reckon those homicides account for a lot more than gang warfare. You're a random crazy and decide to go on a killing spree and your mothers gun isn't close at hand your next best bet is a baseball bat or a knife. You're suddenly substantially less dangerous. Which is the big thing worth taking note of. Most people with a gun that kill, aren't criminals until the moment they take that legally acquired gun, filled with bullets from the local supermarket, and shoot up a bunch of people. Take away the gun and the bullets, you've still someone about to become a criminal. But likely not a killer, and a dozen kids to grow old to boot.
In fact there needs not just to be social outreach programs to keep kids out of gangs, and make people know the police are around to help, and get the community comfortable with going "yeah my mate seems a bit messed up, fear he might do something silly, want to have a word with him". But also work on the mindset of weaning of most of the nation on this notion that civilians need access to weapons of war.