As others have noted. Fully automatic weapons are already banned. Background checks for purchases is already required. And it is already illegal for criminals to have them. What we do not have are laws banning guns from people who are not yet legally considered mentally ill, or have not yet committed a crime. We do not yet control the transfer of guns from private individual to private individual (something that is totally legal in context of private property), but Obama will soon push through legislation with the help of people like you who don't truly understand the consequences in context of private property rights and basic constitutional liberties.