Here is just one more thought about gun control.
Montana as a state has one of the highest per capita gun ownership rates in the country, and some of the most relaxed gun laws in the nation. You can buy an M4(I hate to say assault rifle, since its nothing more than an ugly.22) at the freakin walmart...no joke. Yet we have never, as far as all the records I have looked at go, had a similar mass shooting. What does that say?
We have had our fair share of crazies, don't get me wrong! But they don't seem to choose a gun as their weapon very often. Knives mostly.
You should also hate to say M4 then... An M4 has select fire and a notch in the barrel for a grenade launcher.