I mentioned the AR-15 already, because it is a popular weapon for these things. It was used in the movie theater shooting and at the Oregon mall shooting, and probably in others. That being said, there are hundreds of rifles with similar capabilities, so singling out such a weapon would do absolutely nothing to curb the death count in those situations.
Also, it's worth noting that it is impossible to "spray" bullets with a semiautomatic weapon. You can achieve an accurate rate of fire that would surprise most people, but it will still be just a small fraction of what a fully-automatic weapon is capable of putting out. Many times, people who have been traumatized in such a situation will remember things more intensely than they actually occurred, because they are still in shock. It's perfectly natural for people to claim they heard automatic fire, because when you are being shot at, it seems like a hell of a lot at the time.
Anyways, check again tonight or tomorrow, and I'll have posted a better response.
The Tec 9 looks like a submachine gun, but as I previously stated, it is not. It was originally designed as a submachine gun, but when the company failed to obtain a military buyer, it released a semiautomatic version to sell to civilians. Magazine capacities ranged from 10-72 rounds, but the ones used in this shooting appeared to be 32s.
Hi-Point model 995 – Semiautomatic Carbine
The Hi-point Carbine is often said to be a rifle, but that is inaccurate. It fires pistol rounds, and the model used in this shooting probably fired 9mm to be more exact. It holds up to 11 rounds total.
Illegally modified, Sawed-Off, Savage-Springfield 67H Shotgun
Illegally modified, Sawed-Off Double-barrel Savage Arms 311 Shotgun
There isn't anything notable about the two models of shotguns that were used. The only thing really sinister about them is that they were illegally modified by shortening the barrel and the stock. The simple act of modifying a shotgun in such a way is enough to get you sent to prison for a couple of decades. (Remember Ruby Ridge? The ATF raided his house and murdered his wife and kid all because he cut the barrel of a shotgun like 1/32 of an inch too short.)
VA Tech Shooting
In this shooting, the killer used a Glock 19, a 9mm, Semi-automatic pistol that is a favorite among police officers. According to Wikipedia, he was using 15 round magazines, but they also make them from 10 rounds to 31 rounds.
The other weapon the shooter used may actually surprise some people. It was a Walther p22. What is notable about this weapon is that the cartridge it fires is extremely weak. It is chambered for the .22 Long Rifle Cartridge. .22 LR is a rifle round, but it is one of the weakest available, and would do less damage than nearly any other pistol round. This weapon had a 10 round Magazine.
I believe this shooter may have had more weapons, but so far I have been able to verify that he had at least a Glock, and a Ruger Mini-14. Before the shooting, he allegedly attempted to obtain both a Rocket-Propelled Grenade, and a fully automatic AK-47, but failed to do so.
Glock – Most glocks are pretty much the same as the one I described above. The only significant difference it could have had would be a more powerful round, such as a 10mm, .40 cal, or a .45. I can’t find what he used, but basically, it was a typical semi-automatic handgun.
Mini-14 – A semi-automatic rifle that most commonly comes chambered for 5.56/.223 rounds. In other words, it normally fires the same rounds that the AR-15 would. It looks more like a traditional rifle, but it is pretty much equal to the AR-15. The shooter in Norway used several of the standard size, 30 round magazines during his killing spree. It’s worth noting that I've never heard this weapon referred to as an assault rifle until the Norway shooter used it as such.
AR-15 – I mentioned this weapon in my previous posts, so here’s a picture for anyone who doesn’t know what it looks like.
While recent mass shootings seem to revolve around the use of the same types of weapons, I'm not convinced that outlawing semi-automatics would actually prevent deaths, or if it would lead to the increased use of other types of weapons(including other guns.) We had a pretty heated debate on HN about the war on drugs recently, and some people brought up a valid point, that as long as people want to have access to something whether it's legal or not, they will find a way to obtain it.