I, personally, would have no problem with the banning of those weapons, but I'm afraid that the NRA would fight that tooth and nail. I certainly agree that there is no valid reason for selling or owning guns like that. They are of no use for hunting, so that leaves just target practice.
Truly, I know next to nothing about those types of weapons or why anyone would want them. Heck, I don't even hunt and I never have had any interest in doing so.
Perhaps, our friend 911 could help us out here. If he was at a combat range, could he get off practically an unlimited amount of rounds with an automatic hand gun, provided he had a 20 loaded clips on his person ? If the answer is yes, wouldn't that be just as deadly as an AR-15 ?
When I was down at the FBI training facility in Quantico, VA, I was shown numerous weapons that had been confiscated from drug dealers. Some of those weapons are pretty sophisticated and included one handgun that had a 300 round clip housed inside of an outer shell. It looked like a box mounted on a pistol. They also showed us a machine gun that also included a grenade launcher (M4 Carbine Commando with an M203 Grenade Launcher). The FBI Agent that was in charge of the weapons at the training facility showed us weapons that I never even knew existed.
Like I said earlier, if I am firing at someone close range, I much prefer the 12 gauge pump. If I was close enough, I could blow a hole through a man large enough to sick may hand and arm through.