That isn't what you have done. In your ignorance, you have posted pictures of illegal, fully automatic weapons, and implied that they have something to do with the current gun ban (which only covers self-loading rifles, i.e., "semi-autos", with certain cosmetic features that make them look similar to the weapons used in the photos you posted, but which are mechanically different).
Of course, even this ignores the fact that the only people who died in the event from which you took those photos were the perpetrators themselves; they would have done far more damage with "ordinary" hunting rifles.