On what fucking planet?
I'm gonna go out on a limb here and guess that number is completely and utterly false....and not just by a small amount. I'm going to guess it's astronomically... comically false.
According to the FBI, in the US in 2012 there were
310 justifiable homicides.
Only 259 with guns. In the same year, 8,342 criminal homicides using guns, 20,666 suicides with guns, and 548 fatal unintentional shootings.
You looked at that number and honestly thought "yea that sounds right about 500 people successfully defend themselves with guns every day in the US....
on the low end!"
That number looks realistic to you?
Even if I'm crazy generous to you and allowing for the idea that justifiable homicides don't necessarily mean "successfully defending their own lives and / or the lives of their children", you are telling me that there were 188,342 attempted homicides in 2012, and only 8,342 were successful because the other 180,000 were thwarted by lawful gun owners? ...and out of that, the lawful gun owners only had to kill 259 people....Haha....on the low end of the estimate!