http://www.thefirearmblog.com/blog/2018/05/30/australian-secret-gun-factory/
About that whole civilian disarmament program in Australia thing, it doesn't work. Anyone with a basic knowledge of machining, 3d printing, and molding plastics can produce all the firearms, ammunition, and accessories you could ever need! Instead of dealing with the PERSON misusing a tool, the went after the tool itself. It has proven to be a failure.
The only thing this has accomplished has turned ordinary citizens who refused to turn in their guns into criminals, and criminals having to resort to making their weapons. Good on ya mate!
I'm not sure how you equate one dodgy 3d printing operation to a failure in gun control. Over 20 years without a mass shooting and a murder rate that is one fifth of the US is a pretty strong indication it does work.
The fact that criminals who want to have guns will go to extreme lengths to obtain one proves that. Prohibition, in any form, never works. You are simply creating a black market for the prohibited item.
Once you account for gang violence in major U.S. cities, the U.S. is the safest place on Earth. In those 5 counties, gangs operate in areas where guns are strictly prohibited. Not prohibited for them, because their criminals and don't care about gun laws. It is prohibited from law abiding citizens who want to own a tool to aid them in self defense.
https://www.washingtontimes.com/news/2017/apr/25/most-murders-occurred-in-5-percent-of-countys-says/