Various SCotUS rulings have established that for a weapon to be protected under the 2nd amendment, it must be appropriate for service in the militia, in common use at the time, part of the ordinary military equipment. and suitable for any of the traditional legal uses for a firearm.
There is, quite possibly, no better specific example of this weapon than the AR-15 with 20/30rd USGI magazines, and no better general example than 'assault weapons' as a class.
Given that, please describe how banning such weapons does not violate the protections of the 2nd.
Im going to put a disclaimer in front of my reply. I am playing devils advocate here. I have not in the past nor do I now nor will I ever support any restrictions on the right to bear arms.
Ok, Shooter, heres the ONLY arguement I have ever heard that actually made some sense.
Which is more important: The 1st or the 2nd amendment?
I would argue that they are equally important, one nor more than the other and even that they are complimentary, perhaps even symbiotic.
Yet, we have placed reasonable restrictions on the 1st amendment have we not? It is illegal to walk into a crowded place and yell," FIRE!" for example. Child pornography, and other obscenities, time,place and manner restrictions and restrictions on what can and cant be broadcast on the public airwaves are other examples.
If there can be reasonable restrictions on the 1st amendment, which is no more or less important than the 2nd amendment, then in a world in which a semi automaic weapon is perfectly legal to purchase, then could there not also be reasonable restrictions placed on the 2nd amendment that protected society while still preserving the right of the individual to "bear arms"?
If you agree with the above, then the debate becomes about what is considered reasonable as oppsed to a "BAN ALL GUNS!" vs "FROM MY COLD DEAD HANDS!" battle, which isnt a debate, in my opinion, but a stand off.