3D-printed full-auto bullpup ‘ghost guns’ can now be made for a couple of hundred dollars — designs have evolved dramatically outside the U.S.

The topic of 3D-printed “ghost guns” has always been one of the highest-caliber discussions worldwide — both in and out of the United States, where gun ownership is chambered in the Constitution. Things are a bit different outside the U.S., as detailed in an interesting exposé in Bloomberg — ownership of guns is highly restricted in other countries, and their manufacturing, even more so. The write-up is interesting for anyone interested in 3D printing or guns, as it details the evolution of the…