This is a long read, but one with a great deal of information on the history of the 2nd. Amendment, court rulings and gun control...

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The Right to Keep and Bear Arms

REPORT
of the
SUBCOMMITTEE ON THE CONSTITUTION
of the
UNITED STATES SENATE

NINETY-SEVENTH CONGRESS
Second Session
February 1982

Printed for the use of the Committee on the Judiciary

complete text...