I don't know...if average citizen didn't have access to an assault rifle like the one the shooter used that seems fine with me.
I don't believe the shooter had an assault rifle.
Sorry, but the rest of this post is going to be pure info-dump.
An "assault rifle" is a weapon that's capable of selective fire. Which means it can switch from semi-automatic mode to full automatic mode.
Let me explain what "semi-automatic" and "full automatic" means. To put that in laymen's terms, when you pull the trigger on a semi-automatic, it fires once and then, using the energy from the bullet firing, cycles a fresh bullet into the chamber. To fire another bullet, you have to pull the trigger again. (Think of a semi-automatic as a revolver that you don't have to pull back a hammer each time. This isn't technically accurate, but it is similar to how a semi-automatic works.) A full automatic is different. When you pull the trigger, the gun keeps firing bullets until it runs out of ammo. Think of a full automatic as a machine gun like an old-fashioned tommy gun that gangsters use in the movies. Or a machine gun. Both are full automatic weapons.
Now, I can walk down to any gun store and get a semi-automatic weapon pretty easily. No problem at all as long as I pass the criminal background check.
But if I walk into the same gun store and ask for a full-automatic weapon, I'm going to run into problems. First, the dealer is going to have to be licensed to sell them. Assuming that's the case, I'm going to be required to be licensed to buy one. See, back in 1934, tommy guns weren't some b-movie cliche, but were a serious problem for the government when it was trying to stomp down on bootlegging. The government passed a rather strict law when it comes to possessing a full automatic firearm.
Basically, the government would want my fingerprints, would want two passport photos, would want a fee, and will run a criminal background check on me. Oh, and local law enforcement must sign off on the ownership. Weapons are restricted to those made before a certain time (no new full-automatic weapons can be registered, with a few exceptions). Assuming that I fulfill the requirements, the weapon itself must be registered, and any changes in possession (as if I sell it) must also be registered.
Owning a regular gun is fine. Owning a full automatic weapon (as in a machine gun) is a lot harder. Several states ban them outright. (Colorado is
not one of them.) But there are no credible reports that an assault rifle was used.
You may be thinking of an assault
weapon, which is a term defined into law with the (now expired) assault weapon ban. An assault weapon is basically a bull**** term that came into being when a bunch of people who didn't know much about guns tried to ban the scary looking guns. (I wish I wasn't exaggerating - these are your congresscritters at work.) When the assault weapon came into effect, it banned certain types of semi-automatic weapons. The manufactures ended up making a few minor changes that for the most part didn't affect any functionality of the weapons they were producing, and got around the law. This result was more or less predictable by anyone who read the law, knew a few things about firearms, and could think.