As a man who lived through a government "buy back", let me give my real experience: Politicians, media and "community leaders", school teachers and even hunters and sports personalities were part of a national effort to convey the idea that "guns kill people".
Then the announcement of a purchase by government of privately owned firearms (almost exclusively long guns, as handguns were already very restricted) was put into action. Under legal threat, peer pressure, urging of children and general media brainwash, the piles of shotguns and rifles appeared in the major news media being crushed.
This was all precipitated by a deranged young man, under psychiatric treatment and using psychotropics, ambushed and killed many people in Tasmania. It was later verified that the rifle he used was obtained through a Victoria State Police buy back stockpile.
Victoria, a more progressive state than either W.A. or Queensland, had enacted their own buy back before the Federal scheme (and was therefore directly related to the massacre resulting in the confiscation and extreme tightening of licensing for firearms).
Coincidence? Perhaps.....