[Soliton]

It's to ensure that if we the people need to band together for common defense, that we have the tools to do so.

That is my understanding too. Why does the law then restrict automatic weapons, grenades, etc.?

[Dead Corpse]

Why does the law then restrict automatic weapons, grenades, etc.?

Because the law no longer follows the very document that gives it power over anything. The NFA of '34 is as illegal today as it was then when it was illegitimately passed.