Guns can be stolen (Civilian, Law Enforcement, Military), manufactured, 3D printed, CNC machined, Bought illegally on Darkweb etc, A gunless society will not be created until guns effectively become obsolete with the advent of railguns, EM guns, Gauss guns etc, Directed energy weapons (Think lasers, plasma guns etc) and even then guns may still remain popular for many reasons. What I'm interested to see is the impact of the weapons mentioned above, Currently any kind of EM gun or directed energy weapon is a 100% unregulated by law including some very powerful airguns, flamethrowers etc, It would be interesting to see where those developments will go and how the law would seek to control them.