These are all I know. Add your suggestions.
http://www.okshooters.com/forums/index.php
http://glocktalk.com/forums/
http://sigforum.com/eve/ubb.x?a=cfrm&s=674608412
http://smith-wessonforum.com/eve
http://thehighroad.org
http://thefiringline.com/forums/
http://www.coltforum.com/forums/ubbthreads.php
http://forums.1911forum.com/index.php
http://ar15.com/
http://www.rugerforum.com
http://perfectunion.com
http://m1911.org/
http://www.okshooters.com/forums/index.php
http://glocktalk.com/forums/
http://sigforum.com/eve/ubb.x?a=cfrm&s=674608412
http://smith-wessonforum.com/eve
http://thehighroad.org
http://thefiringline.com/forums/
http://www.coltforum.com/forums/ubbthreads.php
http://forums.1911forum.com/index.php
http://ar15.com/
http://www.rugerforum.com
http://perfectunion.com
http://m1911.org/