States already have the authority to put restrictions on gun ownership and many states do. Even the Federal government has the right to impose restrictions and has done so in the past. Not really. Not with this radical Supreme Court. D.C. v. Heller (200

- S.C. ruled state ban of handguns, automatic firearms, or semi-automatic weapons was unconstitutional. This was reaffirmed in McDonald v. Chicago in 2010. Another case challenging a law that bans carrying concealed weapons in Illinois is coming to the Supreme Court this session and if I was willing to make a bet, I know exactly where the decision will go.
Besides, guns are easily transportable across state lines meaning that amorphous laws in different states really do nothing to solve the problem.
The Federal Assault Weapons Ban expired in 2004. Since it has expired, so many of these assault weapons are in civilian hands that it's almost too late. We've gotten ourselves into this mess when the ban wasn't renewed. The Brady Act in 1993 merely required background checks for people to get guns (a pretty sensible law, though it imposes no restrictions on type or quantity of gun.)
Thus, the last law that significantly regulates the manufacture and sale of specific types of guns is the National Firearms Act of 1968. To anyone who could possibly suggest the law isn't outdated in light of technological advances and new types of weapons, I find the assertion laughable. New laws need to be on the books, though unfortunately we've backed ourselves into a corner, where, in my view, the only means of actually accomplishing anything is to make any law passed retroactive. This will almost surely be struck down by the courts and it would never pass, but it's the only way of actually ridding ourselves of the gross mistake of allowing ordinary civilians to possess and walk around with semi-automatic and automatic weaponry used for warfare.
Finally, to anyone who suggests teachers should possess weapons to shoot at potential gunmen - would you recommend teachers firing at will and engaging in firefights in a classroom of children? And then there's the biggest flaw with this logic. All it takes is 1 crazy teacher. Within seconds, a crazed teacher with a semiautomatic weapon can kill an entire classroom of defenseless school children and themselves. The logical solution would be to ban the gun, logic that seems only to exist in countries that see less than 1/100 of the deaths by guns that we do annually like Japan and the UK.
Scratch and claw for every day you're worth!
Make them drag you screaming from life, keep dreaming
You'll live forever here on earth.