I hope they pull this off.
I look forward to an age where couriers can actually be relied upon to deliver such goods without subjecting them to g forces beyond what their structural integrity can withstand.
The one time I downloaded a documentary that was released for free by the owners on pirate bay (while evidently also being released as a for-pay downloadable movie), a running subtitle not far into the film started going by, and chastised me for downloading it off of pirate bay instead of buying it.
I didn't even watch the rest of the film, and I no longer even remember what it was supposed to be about, but the experience kinda soured me against trusting people who willingly put their content onto pirate bay. If they are going to suggest that I'm a criminal for doing something they evidently were explicitly going to actively permit, I have no interest in what they have to say.
Even assuming that such DRM were feasible to implement, it still could not stop people from printing guns which do not conform to legal standards in the first place, but may still be entirely functional.
Of course, I expect that once this is fully realized, home manufacturing of any kind, without some sort of license and thus subject to regular inspection, is I'm afraid likely to be outlawed in the not too distant future.
Copying of creative works that were not recognized as legitimate by its creator or those who had financed their creation has been called "piracy" since even before copyright itself had been invented.
Words can have more than one definition, you know.