The shootings in Orlando have proven several things beyond any reasonable doubt...
When evil attacks, the SWAT team will enter when they're ready. In Orlando, this would be about 3 hours.
When the evil person is the only one with a gun in a locked building for 3 hours, he will kill and maim many, many people.
If every patron in Pulse had been armed, the events at Pulse wouldn't even be on the news anymore. Suppose half of them were armed. A quarter of them. 10 percent. The psycho would have been dropped, in his tracks, before he could accomplish any of his evil, murderous goals.
People who cannot be trusted with their own safety, or that of others, offer childlike suggestions like more laws about guns, or banning guns. This is like banning fire extinguishers during an arson spree because they are noisy and can damage stuff.
So if you're thinking that 'banning the AR-15' or 'common-sense gun laws' are the answer, it's probably just because you can't imagine yourself standing up against evil with violence. That's okay. You need to recognize your limitations.
But you also need to stop thinking that the rest of us are as incapable. Stay at the center of the herd with your head down, if you must.
But don't interfere with the rest of us. We can, and will, stop evil in its tracks. All you need to do is keep your head down and say thanks.
The adults are here. We are heavily armed.