I've got a weapon model, and all the sides are okay, the nodes and everything are connected okay. I export using bluestreak, and it works.
Then, I create my gbxmodel, and it works fine. I set up my .weapon, and compile my map.
When I go up to my weapon, half of the weapon has disappeared.
I tried redoing it 5 times, but still the same outcome.
Help?

I would suggest making sure the scaling on the model is correct in 3ds. Select the model in 3ds select the move tool or the selection tool and right click on the sizing tool, if the values are not all 100 then you have a problem. You can fix this by doing the following. 1) Make another primitive such as a box or teapot. 2) convert the primitive to an edible mesh and attach it to your model. 3) Use element selection to select and delete the primitive. Check the scaling on your model again.