Almost all guns in the US are semi-automatics. Semi-automatic = one trigger pull, one bullet. Rifles with an "assault weapon" appearance is just that - appearance, they shoot the same as any semi-automatic with a hunting rifle appearance. The vast majority of murders are committed with pistols, due to how easy they are to conceal. The rifles available to the public are sad, weak jokes compared to the versions that the military use. They're not "weapons of war", civilians can't own any of the weapons the military uses.
I'm probably wasting my time, the media creates dozens upon dozens of uninformed people like you every day, no one has the time to explain to every single one why you're wrong.