The support isn't really the greatest but they do usually help a great deal.
If you try opening the gun's HUD.x in FRAGmotion, see if the animation is fine. If so then try using FPSCleaner found in the Bin folder in X10 to remove any DBO and DBU files which can cause corruption and errors.
If Fragmo shows the guns in the same odd position then you'll need to try and get in touch with Errant; he'll be able to diagnose any model-related problems
Sorry all for my furious departure a while ago (well, almost 8 months xD) after deep thought I have decided to return.
I apologise to those I offended.