In hopes of clarifying a few things.
From this pic,
which would you ban?
Which one is the military rifle.
If you say you'd ban all three, fair enough, it's at least an opening for a serious discussion.
If you'd only ban the black one, that's perhaps an opening to a different discussion. Maybe about how certain people are attracted to items with a certain look and if that's a potential indicator of how they might act.
Also how a certain look may repel someone and what their attitudes and actions might be.