Public belief in 2A
Here's latest Harris Poll. Asked if the Second Amendment supported an individual right to arms or a state right to a militia --
41% said individual right
29% said both (which I think is the correct answer, but the Harris people wondered)
Between the two, 70% believe the 2A represents an individual right.
17% said state right only, and 5% said neither (?). I assume the rest were undecideds.
So that's really (if you understand the Amendment, which the Harris people don't, a 4:1 majority for individual right. As Gene Volokh pointed out, if someone wants to argue "living constitution," it would certainly appear that the Second Amendment is "living," indeed quite robust.