Essentially, more guns do NOT cause more crime; even (especially?) Murders.
Suicides? ... well, guns are as effective as the Japanese method of putting your skull between a pile-driver and the pile it's driving, but much more convenient.
Everybody’s Lying About the Link Between Gun Ownership and Homicide:
Everybody’s Lying About the Link Between Gun Ownership and Homicide There is no clear correlation whatsoever between gun ownership rate and gun homicide rate. Not within the USA. Not regionally. Not internationally. Not among peaceful societies. Not among violent ones. Gun ownership doesn’t make us safer. It doesn’t make us less safe. The correlation simply isn’t there. It is blatantly not-there. It is so tremendously not-there that the “not-there-ness” of it alone should be a huge news story.
(And yes, I have talked about this before. I'll talk about it again, next year.)