I saw a photo of that 3-D printed gun, and it looks like a cheap plastic toy. And from what I have researched, the whole thing is held together with some snap-ins, some glue and one metal screw. No thank you. I would rather trust my life to a regular shootin’ iron made of steel and other reliable metals.
Point is not that the gun is good, or even safe.
Doubtless someone will make a better design, someday, but even so its not necessary for this to be significant.
The political point it the important one - that its possible to make a gun this way.
If 3D printers become common, the whole idea of gun control will be moot. They cannot at that point be effectively banned, or even controlled.
/johnny
Folks in nations and states who have extreme restrictions placed on them to obtain a self defense weapon would probably be very thankful for the opportunity to have this in lieu of nothing.