The last three whack jobs that went on a shooting spree used semi automatic rifles. The last two wore tactical gear. Background checks? If all these nutsos want them then I suggest that the idea some one wants them is a sign they are mentally off. The more they assault type rifles want, the more whacked they are. Probably at least at by the square of that number. Have two, 4 times as as crazy. Have 4, 16 times as crazy. Next, add another factor of ten for every piece of "tactical gear" they own. Really, you are way off the deep end if you have to dress up in this tactical gear. Real sane gun owners wouldn't own an assault type rifle. Not good for hunting, not good for self defense. They would be safe. Just those crazy fucks running around in tactical gear toting their AR-15, round them up & send them to the psycho ward.