The Second Amendment to the United States Constitution is that part of the Bill of Rights which protects the individual right to keep and bear arms. According to the American Bar Association, there has been more disagreement on how to interpret the Second Amendment than any other part of the Constitution. Because there are supporters and detractors of the right to bear arms on both the right and the left, this battle will not be decided today. Other cases where the Supreme Court has sought to interpret the Second Amendment include: United States v. Cruikshank (1875), Presser v. Illinois (1886), Miller v. Texas (1894), Robertson v. Baldwin (1897), United States v. Miller (1939), and District of Columbia v. Heller (2008).
Personally, I don't want cops and criminals to be the only people with guns. I believe the intent of the framers of the Second Amendment was to prevent the Government from oppressing the American people through force and give the people a means to protect themselves against unreasonable government intrusion into their personal freedoms.
In light of the Supreme Court's recent decision to remove limits on Corporate political campaign contributions (effectively putting the US Government into the hands of private industry), I suspect the Court will betray the American people again and enforce the proposed weapons ban.
Here is a link to ABC's article on the subject: http://abcnews.go.com/Politics/supreme-court-hears-chicago-gun-ban-case/story?id=9780703