>>1432I wouldn't take this data at face value.
I imagine this survey only takes into account registered guns (or else how would they know they exist?), and there are a lot of unregistered firearms in barns, bunkers and attics all over eastern europe. The countries at the very top of the graph have long traditions of citizens militias, sports shooting and hunting, which gives reason for firearm ownership to be recorded and licensed. The top countries also have low populations which help them to achieve their status. Serbia meanwhile inherited most of the EXTENSIVE Yugo stockpile and was also involved in a war fairly recently. Guns are everywhere after wars.
I am surprised by Czechia though, that country has the most liberal gun laws in Europe. Firearm ownership there is even less restrictive than in some US states. I thought it would be higher.