Free association

This is going to be an occasional series of notes to help me fix half formed thoughts, and nail down concepts that sound pretty good inside my head.

The inaugural one is this:

A well regulated Militia, being necessary to the security of a free State

What are the necessary and proper 10th amendment rights retained by the people that are implied by this clause of the 2nd amendment? 

The anti-gunners never ask this question and I've never seen the pro-gun side ask this either. Is there any literature on this subject?