In reality. There are significant parts that it is better to simply be made of steel if you plan to fire the thing more than once, and safely. There are plenty of guns out there that have significant printed portions. Take Hoffman tactical for instance... google them, he has some pretty decent designs available freely, prints them, tests them, and offers the files... He prints the lower receiver. Think more like the typical polymer parts of guns, the lower receiver on a glock as an example. These are fairly common, and can be coupled with a glock parts kit and slide and have a whole gun without it being registered is the problem that some have. Add in smallish bench size lathe though... I believe in "Shall not be infringed". Any law that restricts me from owning any level of weapon at all, is invalid... I am sorta glad mother fuckin niggers aren't walking around with tactical nukes though.