Just as an aside, if you REALLY want to see some interesting and scholarly debate on the history of 2A, its original meaing and subsequent interpretation go here:
http://www.supremecourtus.gov/oral_a...pts/07-290.pdf
It's the transcript from the recent oral argument in
Heller. It's about 110 pages and, at points, assumes you have read the underlying briefs, but, IMO, it is required reading for any intelligent debate or assertions as to the legal status of a person's right to carry/own guns. Good stuff.