Automatic weapons are not a problem in America. Very few people have them, nobody has ever used one in a mass shooting since you've been alive, so can we agree to stop talking about them?
Semi-automatic firearms are the most common type in the world. Somewhere around 75% of the handguns in America are semi-automatic. You aren't going to ban them. Aside from the fact it is a silly idea, it isn't practical.
The great part about living in a free society is that I don't have to tell you why I need something. Your rights aren't defined by needs.
Imagine if we told Jay Leno: too many people die in car accidents, sorry, you don't need all those cars. We're going to ban them.
Same for books.
The fact of the matter is that a large scale gun ban/attempted confiscation will lead to bloodshed that will make what happened in Las Vegas seem like warm ups. The people calling for gun bans hilariously don't get this. But I can assure you, nobody is ever coming to my home to take any weapon I own without facing death. So, the people who want to ban guns are effectively saying "start the civil war, I don't give a shit because I'm not the one who will get shot, it is the poor sheriff's deputies who have to enforce my dumb idea."