Mark 23 forum and website.

I registered on a mark 23 owners forum:

http://www.mark23.com:6666/board/phpBB2/index.php

I found some nice pics and I think this one should do a nice tee-shirt logo:

The web site has a lot of interesting informations, I discovered my gun has been built in 2003.

http://www.mark23.com/web/