In your basement with simple tools. 3D printers made it a lot easier and better. You can make a pipegun with very little skill.
Ammunition is a bit harder, but again, there is criminal markets that fill the needs.
Ammunition is a bit harder, but again, there is criminal markets that fill the needs.
> but again, there is criminal markets that fill the needs.
Again, those are bigger in some places in the world, and almost non-existing in most parts of the world, even though it's possible to obtain in the right circles.
If we stop assuming the US's "everyone should have a gun at home" mentality is how it goes everywhere, it's still not "easy to get illegal guns" in most parts of the world.
The pipe is metal. You don't print that part.