And in Australia, "We banned it all, why don't these commoners

just give up and stay unarmed!"
No, that's not working.
Authorities have seized more than 1,000 firearms and gun parts in a crackdown on the spread of illicit weapons in Australia and New Zealand.

The week-long transnational operation led to more than 180 arrests, according to Australian Border Force, and the seizure of 281 privately manufactured firearms and parts, including those made by 3D printers.

In New South Wales, police located multiple 3D printers alongside Glock-style pistols, magazines and 3D-printed holsters, among other items.

A Guardian investigation in September tracked the growing challenges posed to Australia’s gun control regime, including the trade of stolen firearms and the emergence of 3D-printed firearms across the country.
They weren't keeping people from making guns before 3D printing got going, so now?  



Private security guards patrolling housing estates in Melbourne’s outer west will start carrying guns before the end of the year as they face an unprecedented wave of violent home invasions, carjackings and machete attacks.

Torched stolen cars, high-speed chases, machete slashings and bloodied streets have become all too frequent in the city’s booming western fringe, where police are often stretched thin, and youth gangs are going to war.

“The escalation to firearms is because of what’s coming our way and the threats against our safety, against my team,” said Grant Burton, the owner of security company YPG Risk, whose night patrols are funded by housing estate residents.

“We have to ensure that our staff go home to their families. We are all residents of the west,” he said.

“We have no option but to go from baton to firearm.”
...
Under current regulations, security guards are not allowed to carry controlled weapons such as capsicum spray or Tasers, but they can apply for a gun licence under strict conditions.
Bold mine.

Holy shit. And that's for licensed guards, but the plain old citizens are screwed.  And if you don't have enough money to live in a place with private guards, double-screwed.  Just like what Mamdani and Occasional-Cortex & Co. want here.