Are 3D Printers the Replicators of ST-TNG?

Are the new 3-d printers the replicators we are familiar with from Star Trek: The Next Generation?  Lots of concern that these devices, which can apparently make guns, will end any effort gun control and otherwise let anyone create anything.

But are we there yet?  Can they reproduce something so that the internal chemistry, the internal wiring, whatever is all the same?  More importantly, are these things so cheap that anyone can have them?  I simply do not know.  But I sincerely doubt that anyone can simply get one of these things and pump out tons of guns, bullets or whatever.  Especially when guns and bullets and whatever are easy to  get at a fraction of the price.

Lots of fear-mongering, but until the supply and demand of these things leads to quality/quantity/input/output dynamics that compete with guns, I am more worried about the conventional gun manufacturers and their political power than the new cool devices.