They did no such thing. Australians own more guns than ever. They had a buyback program, and people used it to turn old guns into new ones.
You folks aren't actually going to make me dig up and link video of the guns being steamrolled, are you?
So go ahead and post the video. Then read the rest of the story.
[1] https://australiainstitute.org.au/post/australia-more-guns-n...