Assault Weapon?

The term "assault weapon" is typically given to any of the scary military-like rifles or weapons such as an AR-15 or M-4.

The argument from the left is: "why do civilians need the same weapons as the military and law enforcement? When the 2nd Amendment was written the founders had no consideration or idea about modern assault weapons."

Funny thing though.....when the 2nd Amendment was written, citizens DID have the same guns as the military. So did the founders know what they were doing?