Earlier quoted context omitted.
To be honest during WWII, Switzerland was surrounded by the Nazis. Literally. On all sides, and learned a harsh lesson on not just the importance of military readiness but also economic resilience. So they took what they could get.
Switzerland is the best munitioned country on earth, because: After military service, most people keep their guns and are forced to yearly practicing (or loosing the gun) etc. - they are battle-ready every time. Plus: they are the only(!) country on earth who could offer bunker protection to 95%+ of society in case of war.
Even if you only considered the guns, your claim seems to be false: https://en.wikipedia.org/wiki/Estimated_number_of_civilian_g...