Assault Weapon Bans give you cooler looking weaponry.

Explain Gun Control and Safe Spaces — Assault Weapon Bans:

After all, "Assault Weapon" is a political invention, not a class of firearms.

The Truth About Assault Weapons:

And why did "assault weapon" come about?

The difference?  Scarier looking, to the poorly informed and uneducated.

After 30 Years Of Lies, NY Times Admits "Assault Weapons Are A Myth" - Bearing Arms - Assault Weapons, NY Times