Just of note, automatic weapons where ban in the early 80's those that are left in the US are tightly regulated and require a FFL class 3, have strict rules on transfer and the local sheriff must approve the transfer. Many sheriffs will not allow class 3's in their county. If they will not, the resident is out of luck on getting one of the few automatic weapons left. Those remaining weapons sell for upwards of 10 to 20K and not one has been used in a mass shooting in recent history. People buying automatic weapons are by and large collectors.
What you are referencing is semi-automatic weapons, which require you to pull the trigger each time you want a bullet to fire. Many hunting rifles are semi-automatic. The difference between a semi-automatic hunting rifle and a semi-automatic black rifle is the difference between a Corvette and a Corvette with a Ferrari body kit. It's all cosmetic they are at the core the exact same rifle. A Remington semi-auto .223 hunting rifle is in spirit the same gun as a AR-15.
Handguns and homemade explosives are a much greater public threat and that is the reason most gun rights advocates see no value in compromise. The issue is completely a emotional issue and the facts, which advocates are well versed in, weight out contrary to the arguments that gun control advocates are making. The reality is that other than the occasional mass shooting people are just not being killed by rifles of any kind. Handguns are used in orders of magnitude more than rifles to commit violent crimes. A sincere effort to remove guns from criminals would focus on handguns and not rifles. Therefore rights advocated jump to the conclusion that the effort is to disarm the legally owned, armed population as that is the majority of rifle owners. The simple fact is the majority of criminals use handguns, they are more easily concealed, easier to wield and easier to reload.
The only exception to this is mass shooters who want to LARP Call of Duty. Which is why they choose rifles if FPS's and movies used handguns, mass-shooters would use handguns because in their crazy minds they are role playing. That being said, you have a slightly higher chance of getting killed in a mass shooting than you have getting hit by lighting. By the number it's just a non-event. In saying that, I am not trying to minimize them, just stating the facts, they are horrible events and we should certainly do something about them. But disarming millions of law abiding citizens to prevent a lightning strike event punishes the masses for a statistically small problem.
Common sense gun control would have at it's core handgun controls as well as mental health protocols. If they don't then they are conceived via emotion rather than statistical fact.