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It will be necessary to ramp up the current 3-D printers before a “printable” gun is produced. The “proof of concept” plastic prototype failed after six rounds. That may suffice if the goal is to use it to get a real gun as was done during WWII with the $2 throw away single shot, smooth bore .45ACP pistol. However, a printable real gun is going to require a printer that can sinter metal powder into a solid metal part.

That level of technology already exists but is not available at the price of the "hobby" printers due to the costs associated with the higher power lasers. Professional grade printers also have the ability to print larger parts because they have a larger scanable volume.

Regards,
GtG

PS The government answer to the printable gun will be to remove ammunition from the civilian market. Casting lead bullets is no problem. Making cartridge cases without a deep draw press, not so easy. Making smokeless powder and primers (or even percussion caps), big problem. Go back to flintlocks, I don't think so...BLOAT