But what happens if this challenge does get to the SCOTUS and we lose? Remember the DC v Heller decision of 2008? It was about the constitutionality of Washington DC's ban on handguns. We just barely won with a 5-4 decision. I don't think the current SCOTUS would overturn the restrictions on machineguns.
This is the fear I had with Obama winning again. If he can get one more socialist liberal on the bench, America is in trouble.