"The powers they conferred on this government were to be exercised by itself; and the limitations on power, if expressed in general terms, are naturally, and, we think, necessarily, applicable to the government created by the instrument. They are limitations of power granted in the instrument itself; not of distinct governments, framed by different persons and for different purposes.(...)
The third clause, for example, declares, that 'no bill of attainder or ex post facto law shall be passed.' No language can be more general; yet the demonstration is complete, that it applies solely to the government of the United States. (...)
Had congress engaged in the extraordinary occupation of improving the constitutions of the several states, by affording the people additional protection from the exercise of power by their own governments, in matters which concerned themselves alone, they would have declared this purpose in plain and intelligible language." There is no reason to suspect that the Second Amendment is different.
And if there aren't just what the heck is the meaning of the ninth amenmdent when it states "The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people."