"...the right of the people to keep and bear arms shall not be infringed."
Seems to me that the right of self defense is implicit in the 2nd Amendment, though radical libs would argue otherwise.
"The powers not delegated to the United States by the Constitution, nor prohibited by it (The Constitution) to the States, are reserved to the States respectively, or to the people."
Therefor, it is the States who have supremacy, even though most state AG's cowardly relinquish those rights to the federal government.