well, unfortunately, when these weapons WERE banned, it had no effect whatsoever, according to statistics and the ATF and GAO studies.
Again, in the middle of the ban, Columbine.
In Norway, on July 22, 2011, Anders Behring Breivik killed 69 kids and adults at a youth camp, and injured another 110, with legally obtained firearms
Norway has much stricter gun laws than here.
What kind of an assault weapon did Martin Berns or Timothy McVeigh use? Oh yeah, a bomb.
McVeigh used fertilizer to kill 168 people, including 19 children under the age of 6, and injured 680 people.