It was confirmed for the previous ~130 or so, at least, since United States v. Cruikshank... although I certainly wouldn't want to go back to those days before the Bill of Rights were incorporated against state/local governments... Basically it was a blank check for racists to suppress minorities.

The result of United States v. Cruikshank was that southern states were allowed to to prohibit black individuals from owning firearms to defend themselves from the KKK. Not exactly a great example of gun control.

What's also crazy it is that it is also relatively recently that the first amendment was incorporated against states and localities as well.