4 links
Air Power Owners Group
airsoldier.com
Dedicated to markers produced during the late 80's and early 90's including the Apex, Apex Elite, and Vector. Includes articles, FAQ, forum, gallery, and links.
Angel Owners Group
angel-owners.com
Dedicated to WDP markers. Includes technical information and forums.
M. Carter Brown
mcarterbrown.com
An online community of collectors of old and rare paintball equipment. Includes forums, directory of owners, and a gallery of classic markers.