Citation(s) from the GunPolicy.org literature library
Karp, Aaron. 2003 ‘Fewer Blanks: Global Firearm Stockpiles.’ Small Arms Survey 2003: Development Denied, p. 64. Oxford: Oxford University Press. 1 July
Among the 15 formal member countries of the European Union, the total stockpile of civilian firearms is more than 67 million. With a total population of 375 million people, this amounts to 17.4 guns for every 100 people in the European Union.
These figures cover only those guns whose existence can be reasonably confirmed. The stockpile figure might be considerably higher if comprehensive data was available for all EU countries.