Saying a ban on assault weapons is just saying a ban on military weapons ( weapons made for the military) which would include those weapons. What would be allowed is hunting guns and other sport like weapons( with some weapons added for self defense) there was a shooting after parkland where the shooter had a pistol and did not kill anyone and was taken down by a resource officer. So clearly there is real action beetween weapons and casualties.
Assault Rifles or ARs are weapons designed for military combat. The U.S gives arms its troops with ARs because the are fast firing weapons that can tame down a lot of people. Compared to a hand gun that shoots slower and is not a military weapon but a weapon for self defense sport and police use.