So there's obviously a spectrum from minor weapons to extreme weapons. Even the most crazy ass right-wingers would say no one should be allowed to have nuclear weapons. Great, we've established that. 98% of people would probably agree no citizen should be allowed to own a rocket launcher. Why would anyone ever need a gatling gun, or machine gun of any sort? Shooting ranges? Great. If these assholes really won't budge on this, why not set up something where they have to be kept at a shooting range? You have to have two keys, just like a safety deposit box, so an employee wouldn't be able to take it out when they are there by themself. I'm not sure why we couldn't do this for all automatic guns. Is there any reason an average civilian would ever need an automatic gun?
I'm not sure how many times an automatic weapon has been used in these instances. But we shouldn't have to wait for one to happen. These things are only going to get worse going forward.