Soldato
The airgun bbs is the only other forum I am a member of and is a great place if you're interested in airguns. Great bunch of members that are willing to help each other out. For instance I had a part break on my gun and couldn't find a replacement, so one of the members knocked me up part on his lathe and sent it me for free!
Also visit 4chan and a few others, but I don't think they can be considered forums.
Also visit 4chan and a few others, but I don't think they can be considered forums.