"Assault Rifle" is a trigger phrase to scare the left sheeple and has no parameters other than "Scary" and "Military Style". It can and is applied to anything the left want to ban. Have you seen the new buzz words "Assault Handgun" and even "Assault Knives". Stand by for the "Assault Pencil" and "Assault Brick".Good point. I'd struggle to come up with a good definition to be honest.