It really hasn't been used because it is the most effective. It has been used primarily because of the media attention it draws. It is hardly the most effective weapon. In fact, pistols are more effective as they allow you to more easily get into a densely packed area undetected before opening fire. A long gun is very difficult to conceal and thus not optimal in most cases.

Once again, the deadliest school shooting (Virginia Tech) and the deadliest single person mass shooting (Norway) were not carried out with an AR-15. The weapon seems to be drawing unwarranted attention from gun grabbers because they don't know what the fuck they are talking about when discussing firearms.

Why is "probably isn't" wrong?

Oct. 7, 2007: Tyler Peterson, 20, used an AR-15 to kill six and injure one at an apartment in Crandon, Wis., before killing himself.
June 20, 2012: James Eagan Holmes, 24, used an AR-15-style .223-caliber Smith and Wesson rifle with a 100-round magazine, a 12-gauge Remington shotgun and two .40-caliber Glock semi-automatic pistols to kill 12 and injure 58 at a movie theater in Aurora, Colo.
Dec. 14, 2012: Adam Lanza, 20, used an AR-15-style rifle, a .223-caliber Bushmaster, to kill 27 people — his mother, 20 students and six teachers — in Newtown, Conn., before killing himself.
June 7, 2013: John Zawahri, 23, used an AR-15-style .223-caliber rifle and a .44-caliber Remington revolver to kill five and injure three at a home in Santa Monica, Calif., before he was killed.
Oct. 31, 2015: Noah Jacob Harpham, 33, used an AR-15, a .357-caliber revolver and a 9mm semi-automatic pistol to kill three on a street in Colorado Springs, Colo., before he was killed.
Dec. 2, 2015: Syed Rizwyan Farook and Tashfeen Malik, 28 and 27, used two AR-15-style, .223-caliber Remington rifles and two 9 mm handguns to kill 14 and injure 21 at his workplace in San Bernardino, Calif., before they were killed.
June 12, 2016: Omar Mateen, 29, used an AR-15 style rifle (a Sig Sauer MCX), and a 9mm Glock semi-automatic pistol to kill 49 people and injure 50 at an Orlando nightclub before he was killed.
Oct. 1, 2017: Stephen Paddock, 64, used a stockpile of guns including an AR-15 to kill 58 people and injure hundreds at a music festival in Las Vegas before he killed himself.
Nov. 5, 2017: Devin Kelley, 26, used an AR-15 style Ruger rifle to kill 26 people at a church in Sutherland Springs, Texas, before he was killed.
Feb. 14, 2018: Police say Nikolas Cruz, 19, used an AR-15-style rifle to kill at least 17 people at Marjory Stoneman Douglas High School in Parkland, Fla.

I’m not advocating every teacher carry a sidearm. Those that volunteer can be trained.

Perhaps just a couple of additional people running toward the intruder, or defending their classroom, versus running away, would reduce casualties.

If I were a teacher, and my Dad was, I would want to try to protect the kids in my classroom.

yeah, really hasn't been used that much. no worries.

I think we should ban the AR15/guns like it and clips over a certain amount of rounds.

If we make some law or amendment, does this open a door to other things such as limiting free speech?

I guess what I am saying is, in theory this is sounds great, but how does this play out? Do shootings stop? Why do all school not have officers posted? Why is there not better security?

We've banned machine guns and other things and the 1st and 2nd amendments were fine. I think it's too late to ban them anyway.

That might be a side bar into military grade weapons. I could ask, why can't I drive a tank around town? That's pretty simple to answer.

There might be a bigger picture with money in politics to get it banned.

I do wonder, if there is this big of an outrage to ban them, why don't people vote out the lawmakers who refuse to act on this?

Fair enough. And admirable in the thought.

We just just have a difference of opinions on this one.

Assault weapons were banned in the 90's for a decade and it sounds like hunters and guys like Darkside see no purpose in having one.

I'm not a gun guy and I don't know the language, what defines an "assault" weapon?

yeah, really hasn't been used that much. no worries.

I'm not a gun guy and I don't know the language, what defines an "assault" weapon?

Many that is true, but an incomplete statement.

No clue. The AR15 was in that class.

Many that is true, but an incomplete statement.

Dumb idea, arm some jerkoff football coach at school? - not gonna work.

Armed police officer in every school. 1 per 500 students.

Don’t want to hear about how to pay for it, this country wastes millions every day on bullshit.

Dumb idea, arm some jerkoff football coach at school?

Ah, Lemonparty, the 8th sacrament.

I'm not a gun guy and I don't know the language, what defines an "assault" weapon?

My memory is a little fuzzy but when I was about 20 I paid $5 for my FOID card and had to wait a couple of days to complete the purchase of a handgun. How are these kids able to get guns the same day?

Many that is true, but an incomplete statement.

seems so obvious doesn't it? Couple of full time police officers in every high school. ID badges to get through secured doors like any office building has. X-Ray machines. security cameras around the exterior. Too bad most people aren't really serious about stopping school shootings.

My memory is a little fuzzy but when I was about 20 I paid $5 for my FOID card and had to wait a couple of days to complete the purchase of a handgun. How are these kids able to get guns the same day?

Ah, Lemonparty, the 8th sacrament.

seems so obvious doesn't it? Couple of full time police officers in every high school. ID badges to get through secured doors like any office building has. X-Ray machines. security cameras around the exterior. Too bad most people aren't really serious about stopping school shootings.

In Illinois, there is a 3-day waiting period for hand guns. So technically, if I buy a 22 caliber pistol, I have to wait 3 days. But rifles can be purchased the same day. When I bought my dad his AR-15, I was able to get it as soon as the background check cleared.

As I'm sure it's been said before, AR does not stand for Assault Rifle. It stands for ArmaLite Rifle named after the company that developed it.

Yes it is.

When this is all over, which is not going to be for a while, Trump will be re-elected President.

This kid knew the school protocol and the weakness in it. He was able to blend in with other kids and enter the school at the end of the day.