Amendment II

Document 4

William Blackstone, Commentaries 1:139

5. The fifth and last auxiliary right of the subject, that I shall at present mention, is that of having arms for their defence, suitable to their condition and degree, and such as are allowed by law. Which is also declared by the same statute I W. & M. st. 2. c. 2. and is indeed a public allowance, under due restrictions, of the natural right of resistance and self-preservation, when the sanctions of society and laws are found insufficient to restrain the violence of oppression.

The Founders' Constitution
Volume 5, Amendment II, Document 4
http://press-pubs.uchicago.edu/founders/documents/amendIIs4.html
The University of Chicago Press

Blackstone, William. Commentaries on the Laws of England: A Facsimile of the First Edition of 1765--1769. Chicago: University of Chicago Press, 1979.