[DrScump]

  as established here: (HSPH site)

Item 1: no link to study or data sources stated there, but data is at least 11 years old

Item 2: data well over 20 years old

Item 3: data 18-27 years old

Item 4: data 12-14 years old, and guns in circulation have more than doubled since then

And, ironically, all of this dates from when the Feinstein bans were still in effect.

[knowaveragejoe]

You're right. The concentration of firearms can in no way affect the rate of gun crime in this country.