Sorry dropped the first line:
US Homicide rate – 4.2 per 100,000
Swiss Homicide rate – 0.70 per 100,000
US households with guns – 43%
Swiss households with guns – 29%
The Swiss all serve in the militia until at least 30 years old and have the option of retaining their personal weapon after service. The weapon is returned to the factory, has the full auto capability disabled and the weapon is returned to the individual.
Somehow this empirical data leads me to think we should be looking at something other than the guns.