''If we were to ban guns of all kinds outright then, obviously, guns could become virtually impossible to get.'' - 3

printing, that is all.
Arguing about what constitutes a state is rather less than productive (just like talking about whether the US is a democracy) Mostly because any definition of a state has to include the least state-like state (Vatican City) and exlucde the most most state-like non-state (Hong Kong)
As Vicy says, this point is rather irrelevant. Though i would claim that 'sovereignty' is a tricky little thing. Claiming that the federal government can't do certain things in your home, and shooting at law enforcement officers who try to enter your home (whether legally or illegally) is tantamount to claiming (partial) sovereignty of your property.
And this is something which a lot of gun advocates in the US are far closer to doing than anyone in europe (that i know of, counter examples would be great if you can point them out to me)
Further i think this kind of weakening of state power goes to show that 'militias' - or whatever you want to call them, as they actually exist in the US at the present - actually weaken the national defence rather than strengthening it. At least presenting a threat from within which the government must keep in check (there could be communist militias too you know)
Zach, Dirge, glad you came to join the innocent citizens deserve to die and blame their parents brigade. Please see my comments above.