Can't anyone with a $5.00 file and five minutes make a ghost gun
A $200 off the shelf 3D printer can make a Glock frame, or a 10/22 receiver, or an AR lower, or any of several guns designed from the scratch to be produced by printing. The incremental cost of making another is ~$2 worth of plastic filament.
You may be able to "make" a frame with a 3d printer, but when you go to use it as a firearm, you will most likely be in for a surprise very quickly when it disassembles itself.
Nope. Perfectly serviceable Glock frames, for example, can be printed up with about $4.00 worth of material. You then only need to install some steel rail segments, which are available online, no FFL required, and come with instructions on how. The other parts for a Glock are available online, e.g., complete slide assembly, magazines, no FFL required.
All legal, since (as I understand it) there's no law against making your own firearms from scratch, so long as you don't sell it or give it away, or take it out of state.
