1)FAL Files
2) Uzi Talk
3) NES
FAL Files is my main hangout, with a membership of over 50,000 worldwide, there is always something happening there and if I ever have a question, I can get a quick straight answer.
Uzi Talk is has fewer members but is still worldwide and the people on there are very knowledgable about all types of weapons.
NES-I do visit, but the membership base is smaller and the action here is slower. Also NES is more regional and tends to be lots of Mass Centric questions (I'm in NH) and lots of new shooters. I love to be able to help the new shooters and I'm a former Mass resident, so these things still resonate with me, but FAL Files is still my home
Gunner