still very interesting to think it may be possible to build a pistol in one's basement in the near future.
It's possible to build a pistol in one's basement today
, and has been for decades.
3-D printing won't really change the landscape of gun production until the price of the printers that are capable of making firearm-quality parts drops down enough to make their use widespread. Right now, they cost more than the conventional machine tools you would need to make a pistol. True, the learning curve for a 3-D printer isn't as steep when you can download specifications and computer-control programs for the parts you want, but making a simple firearm in a machine shop isn't rocket surgery, either.