That the "right" to keep and bear arms has been recognized since this country was founded, right? Here's a good quote from a Georgia Supreme Court case from 1846 (note that this court ultimately upheld the law that banned certain firearms):
Nor is the right involved in this discussion less comprehensive or valuable: "The right of the people to bear arms shall not be infringed." The right of the whole people, old and young, men, women and boys, and not militia only, to keep and bear arms of every description, not such merely as are used by the militia, shall not be infringed, curtailed, or broken in upon, in the smallest degree; and all this for the important end to be attained: the rearing up and qualifying a well-regulated militia, so vitally necessary to the security of a free State. Our opinion is, that any law, State or Federal, is repugnant to the Constitution, and void, which contravenes this right, originally belonging to our forefathers, trampled under foot by Charles I, and his two wicked sons and successors, reestablished by the revolution of 1688, conveyed to this land of liberty by the colonists, and finally incorporated conspicuously in our own Magna Charta!
And here's the part upholding the law:
We are of the opinion, then, that so far as the act of 1837 seeks to suppress the practice of carrying certain weapons secretly, that it is valid, inasmuch as it does not deprive the citizen of his natural right of self-defence, or of his constitutional right to keep and bear arms. But that so much of it, as contains a prohibition against bearing arms openly, is in conflict with the Constitution, and void; and that, as the defendant has been indicted and convicted for carrying a pistol, without charging that it was done in a concealed manner, under that portion of the statute which entirely forbids its use, the judgment of the court below must be reversed, and the proceeding quashed.