wanamingo :
Whats the rationale behind having assault weapons at all? They arent used for hunting and no reasonable person would consider one for self defense.
Why do you need an assault weapon?
"Assault" is an action, not a weapon. Let's make that clear. Any gun that fires semi-auto can have any size of magazine. You can go with a bolt action.. great, Charlies Whitman used that and assaulted and killed a lot of people. That's my first issue with "assault" rifles. I called my a defense rifle.
Given that, I use mine for hunting coyotes and boars. You really don't want to go boar hunting with a rifle that holds 3-4 rounds in a bolt action manner. As you may not know, Boars are a huge issue in many states as they reproduce like crazy and destroy a lot of the environment. Very dangerous animals at that and you want to shoot them multiple times, even when down, before getting remotely close to it.
They are useful in self defense depending on your situation. It just so happens these are also the preferred weapon types when "assaulting" as we hear about.
Personal story. About 4 years ago I was at my house when I heard some yelling outside my house. 5-6 people were outside my neighbor's front door. Some were hiding around some bushes, another one around the corner of the garage. They were trying to get my neighbor's 15 year old son to open the door. He had called the police and I had called the police. These people were outside with a baseball bat, a 2x4 looking board, and what may have been a bb/pellet gun, or some form of a club.
Their son called me.. my master bedroom windows overlooked their front door at about 40 yards. This is outside of the range of a handgun for accuracy especially under pressure. They people were beating on the door, broad daylight on a Wednesday around 1pm. The younger daughter didn't go to school because she was getting bullied by one of the outsider's daughters. The son was recovering from chemo from brain cancer. These adults wanted in to beat up the daughter.. disturbing people.
I pulled out my AR-15, loaded it, opened my window, pointed it out my window while I had the neighbor kid on my phone. I told him to get away from his front door. If they made it through that front door I was going to shoot and I didn't him getting hit. This is called self-defense of another human being. They approached with weapons, were taunting a 12 year old girl and a 15 year old brain cancer survivor. I made them aware I was there, I did my legal obligation. I sat there in my room for over 30 minutes. They had left, but it took the police nearly 40 minutes to show up. If those people had made it in, I wouldn't have been able to help much from being so far away with limited rounds. Having 30 rounds was adequate to take out a half dozen people. Self-defense. You have to realize that when many people are coming after one person, having the proper weapon to defend yourself is essential.
Riots, mobs, etc. It happens.. Look to Katrina or Sandy. It was essential to defend yourself.