A 3% dropin anythingis significant.....My understanding is that almost all of these mass shootings are done with some kind of rifle that would be classified as an "assault weapon" even though we know how nebulous that term is.
Oh man. 3% isn't necessarily significant. Especially when you look at the margins of error attached to a lot of crime statistics.
In my city, the police department loves to use percentages with homicides. For example, 33 people murdered in 2011, and 31 people were murdered in 2012. The police department will trumpet that it has successfully reduced homicide by 6%!
It's worth thinking critically and calling bullshit. The police didn't have anything to do with that reduction. There were just two fewer killers across 365 days or, the victims got lucky in the ER, etc.
If you don't actually use these firearms, you probably don't understand that assault doesn't describe squat. If you want to know what an assault weapon might be, ammunition caliber and quality is about the best thing to look at, then capacity, then automation. For example, 223/556 is sold in Walmart dirt cheap -- 20 rounds of Tula for ~$5. I used quite a bit of it in my Bulgarian AK74. Outside of target shooting though, that ammunition isn't good for much civilian use. There are better calibers for outside of 100 yards, no respectable deer hunter would use it, and it would evaporate vermin. It is largely a closer-range anti-personnel round. Anyway, whether the gun is black and has a military design doesn't really matter.
Here's another thing to consider -- the latest charge of assualt weapon ban is led by politicians and police. Politicians are fairweather, and they piss themselves at the thought of what happened out in Arizona. Police just want easier and safer jobs, and they don't care about gun rights because they get all sorts of weapons privileges when they are off duty.
Lastly, if you're going to call black guns assault weapons, then police departments might as well be employing Weapons of Mass Destruction. Even the smallest of police departments has access to full auto weaponry, sniper rifles, combat shotguns, armor, explosives, tasers, drones, etc.
I'm not dogmatic about 2A rights, but I don't like that civilians are less and less dealing with police at arms length.