For the vast majority of Americans, shotguns, handguns and rifles will be sufficient to ward off an attack by enemies, foreign and domestic (although I agree with the article that the second amendment, read logically, does not place restrictions on the kinds of weapons we may keep).
Ironically, those who most oppose the Second Amendment live in the liberal enclaves of big cities. Those cities are most in need of the heavy weaponry the writer is talking about, but they are the ones least likely to have it.
I'm all for Texas nuking up. I think Rick Perry ought to own, oh, 200-300 cruise armed with 20-400kT warheads, and screw any sort of range limitations. ALCM's, Tomahawks, whatever ..... and a few hundred 155mm and 205mm tactical nuclear shells, too.
I want to hear the fresh respect in Barky's sneering voice when he addresses the governor and People of Texas next time.