Accessible Firearms? Print Your Own

SEE HERE  This is an upgrade on the printed weapon talked about a while ago on the internet done on an industrial 3D printer.  This one's larger caliber, more shots, and printed on a cheaper printer.  I guess this should be of concern to all those tyrants that think they can disarm the citizen by regulating firearms.  Of course the next step is making ammunition easy to acquire.  When my dad was a kid he used to make his own gunpowder and fire nails into telephone poles with an improvised gun made out of a steel pipe.  Later and older he lettered in pistol and rifle at the Naval Academy class of 1940!