I wish these were viable solutions. I really do. Here are the 2 main issues with why these systems are just not feasible: Americas population and its firearm saturation.  Switzerland: Conscription of males ages 20-34 is mandatory (Aprox 25% of the total pop) and issued firearms are kept in their home. .25 x 9mil = 2.25 million. If we follow the Swiss gun model we would have to conscript our 20-34 year old population of around 70 mil young men, then arm them then send them home with their weapon. 
The austrailian way is already very close to our model. However almost 90% of the 25 mil people in the land down under live in urban areas which leaves 2.5 mil in rural settings.  This makes sense for aussies because the police handle all of the legwork in its licensing and vetting processes. The US has almost 60 million people living in rural settings. We do not have the resources to apply the austrailian model lock stock and barrel (pun intended). Remember: criminals do not follow laws!