uh keet, the constitution grants certain powers to the federal government... the bill of rights protects certain rights of the states and the people from the federal government usurping power not delegated to it in the constitution. the second amendment does not grant anything to anybody, certainly not exceptions... it protects the states from the federal government infringing on the right of the people to keep and bear arms, in the context of a well regulated militia being necessary to the security of a free state...
and keep in mind that the bill of rights purpose is to limit federal power...and the tenth amendment clearly says that powers not deleted to the federal government by the constitution are retained by the states or the people.