I guess some folks can't defend themselves without 30 rnd mags. How did they do it before ARs came on the scene?
Maybe because when they were available, they usually had a couple of loaded revolvers, a repeating rifle on the horse, maybe a shotgun/street cannon, bowie knives, and derringers. At one point in human and US history, it was LEGAL to carry bowie knives, swords, daggers, and spears, axes, but not anymore, we are mostly limited to handguns by law, most of the time, we cannot carry backup long guns, so we have a primary weapon and no sort of backup.
When I was in a warzone in recent years, I was issued a 9mm and a 3.75" Benchmade automatic knife which I was allowed to keep after my commitment was up. I cannot by law carry the Benchmade under any circumstances BY LAW in most of the US. Not only is it 3.75", it is defined as a switchblade, thus is illegal to carry in 2 fronts. I can carry my pistol legally. In many SD distances, that Benchmade would be more effective, faster, and just as lethal, but I am not allowed to carry it as backup.
Additionally, with the recent invention of things like meth, crack, painkillers, one shot, or 4 or 8 shots may not be enough to take down a perp. The one shot thing only works definitely if you hit high on the spine and completely sever it. Even with a heart hit, they could possibly still stab/shoot you before dying, and may still be conscious and moving for a few more seconds, maybe up to 30, depending on circumstances. We have heard plenty of instances recently were perps have been shot 6+ times including hits to the head, and still manage to run off and functionally live.
Remember, most pistol shots aren't necessarily fatal (even .45), given proper prompt medical care. Ultimately, the handgun is there to allow you to get out of a life threatening situation hopefully by egress, not necessarily kill bad guys.
Really?
Let's assume for a minute--since we don't know for sure--that the Connecticut shooters AR style rifle had a one-round limit. Every time he fired a shot, he had to reload. Would it have had an effect on his ability to murder 26 individuals so quickly? Please say no.
Then I will ask if you could sufficiently defend yourself with a single shot semi-auto (bear with me here, it wouldn't really be a semi-auto, it would be more like a bolt-action), against a person carrying an AR style rifle with a hundred round drum.
Last time I checked, they have taken the AR-15 claim down to a "long gun" claim, and it apparently never left his car. He used mostly handguns, so the premise of the AR ban proposal is false at best in reason.