Let's share the most convincing arguments we have:

 

1) I make it clear that "assault weapons" are no more deadly at classroom/movie theater range than a semi-automatic handgun

2) Such handguns are explicitly protected under Heller, so, within the constraints we have, banning AWs will have no impact

3) Even if all of above could be banned, what do you think of something that can put 45 pellets downrange in 5 seconds? (terrible!). Well, I've just described your grandfather's pump action loaded with buckshot. If I were a mass murderer, that's what I would choose, so why force the bad guy into what is actually a MORE effective tool.

4) A DOJ study of the impact of the Clinton ban showed, as expected, no impact on crime of the AWB

5) Point out some of what constitutes an evil feature. Two that I find powerful are: a) X length stock is legal, Y length stock is legal, but stock adjusting between X and Y is illegal. Good fit is a safety feature preventing unstable holding of gun. b) Safety feature that helps cool barrel and avoid burns is illegal.

 

These have all been field tested and seem to work pretty well on anyone with half a brain and an open mind (yes, some antis have both.)

 

Others?

should also include that there is no such thing as an 'assault weapon'.  the term was made up in 1989 by the media, and its entirely open to interpretation.  'assault rifle' exists and has been regulated since 1934.