A Primer on the Constitutional Right to Keep and Bear Arms
Nelson Lund is professor of law at the George Mason University School of Law
and has just released a major new perspective paper on the 2nd Amendment. It
is available for free in .pdf format at the Virginia Institute.
http://www.virginiainstitute.org/publications/primer_on_const.php
http://www.virginiainstitute.org/pdf/Right_to_Bear_Arms.pdf