Certainly not, but neither are they supposed to be "infringed," and if prohibiting folks from purchasing what can ONLY be termed a "militia weapon" is not an infringement of the Second Amendment, I'd like for you to by God tell me what IS an infringement?
Do you think it requires the jack-booted thugs of the BATF led by Lon Horiuchi showing up at your front door?
Because it's been done...
Slight correction: Horiuchui was or is an FBI agent, not BATF. They aren't that competent.