"Under federal government co-ordination, all
states and territories of Australia restricted the legal ownership and use of self-loading rifles, self-loading shotguns, and tightened controls on their legal use by recreational shooters.
The government initiated a mandatory "buy-back" scheme with the owners paid according to a table of valuations. Some 643,000 firearms were handed in at a cost of $350 million which was funded by a temporary increase in the
Medicare levy which raised $500 million.
[38] Media, activists, politicians and some family members of victims, notably
Walter Mikac (who lost his wife and two children), spoke out in favour of the changes."
https://en.wikipedia.org/wiki/Port_Arthur_massacre_(Australia)#Effects
There has been a CONSTANT trimming of cuckstralia since.