It has never been easier to do clandestine firearm manufacturing. Governments the world over are going to have to come to terms with the fact that they cannot keep people disarmed and the only way forward is to not become a target of their ire.

>>509547429
One of the guys who created the FGC-9 (there were other people who helped, but it was his baby). It's a mostly 3D printed but entirely DIY semi-automatic blowback 9x19 gun that is actively being used in guerilla warfare.

Firearms are such a simple technology that the barrier of entry to manufacture them basically doesn't exist in the vast majority of the planet. Even impoverished peasants in Myanmar are fighting a tyrannical military junta using FGC-9's and other improvised weapons.

In first world countries where we all grew up taking shop classes, almost the entire adult population is capable of doing it (Barring serious cognitive or physical impairment).