The wonders of 3D printers don't seem to stop. But the scary part of it is that it might also be used to make unlicensed guns and other firearms. But that isn't a problem just yet, so people are continuing to make weaponry with it.

The latest is this fully functional mini crossbow. The only thing that's been added to it is the string stretched across the crossbow's arms. As for ammo, we don't think that's printed too. Check it out in the video below: [trenchPhysics via Hack a Day]