Can you define this process a little better?
Exactly what would you ‘print’ on what?
Using a process similar to inkjet printing, one can spray droplets of plastic to form 3d physical objects. Hence the term “3D printing”.
The consequences of this fast growing technology amount to the modern equivalent of Gutenberg’s invention of movable type printing. It will, without hyperbole, change the world. ...and the firearms industry for starters.