It's an individual right

The issue isn't whether the Second Amendment protects a “collective right” or an “individual right.” Surely it protects a right that can be enforced by individuals. But a conclusion that the Second Amendment protects an individual right does not tell us anything about the scope of that right.

Guns are used to hunt, for self-defense, to commit crimes, for sporting activities, and to perform military duties. The Second Amendment plainly does not protect the right to use a gun to rob a bank; it is equally clear that it does encompass the right to use weapons for certain military purposes. Whether it also protects the right to possess and use guns for nonmilitary purposes like hunting and personal self-defense is the question we are trying to decide. The text of the Amendment, its history, and the decision in United States v. Miller, 307 U. S. 174 (1939), provided a clear answer to that question.

In that case. The Supreme Court upheld a conviction under that the National Firearms Act holding that, “[i]n the absence of any evidence tending to show that possession or use of a ‘shotgun having a barrel of less than eighteen inches in length’ at this time has some reasonable relationship to the preservation or efficiency of a well regulated militia, we cannot say that the Second Amendment guarantees the right to keep and bear such an instrument.” Miller, 307 U. S., at 178. The view of the Amendment The Court took in Miller—that it protects the right to keep and bear arms for certain military purposes, but that it does not curtail the Legislature’s power to regulate the nonmilitary use and ownership of weapons—is both the most natural reading of the Amendment’s text and the interpretation most faithful to the history of its adoption.