Ejecting a few Constitutional 9mm Casings

The argument is that the right to bear arms came with the constitution - and the 14th amendment.  As weapons become smaller, lighter,  more potent  (this image isn't of a flintlock) are we getting ahead of what the constitutional framers had in mind?

Personally, I would extend the NRA arguments to automatic grenade launchers [1] and surface to air missles.   Then I would feel protected.