> What isn't there a requirement to report ALL lost/stolen guns?

There is!  What makes @u5a1a1 think there isn't?

> Why does the NRA urge to NOT cooperate with law enforcement

Ummm, they do.  Do you have a valid source of the NRA's lawlessness?  We'll wait.  For the record, I am NOT a NRA member -- just calling you out on something so ridiculous, it needs to be stricken from the discussion.

 Cite a source please! We'll wait.