Their definition of "Military style weapon" and "assault weapon" is any gun that looks scary regardless of any actual function of the gun. Just look at their obsession with banning pistol grips, which are, generally speaking, an entirely ergonomic feature.

And this isn't the first time an aUsSaUlT wEaPoN ban has come up. Most notably the ban passed by old Billy boy back in 1994, lasted for ten years, and did jack shit all to curb gun crime. There have been several tries to reinstate the since 2004 but they have all failed.