First things first: Here's a picture of what I'm working with.
As you can see, I've added a bit of pipe to each barrel to trap more air behind the dart instead of letting it escape. The darts aren't jamming because the pipe is too tight, I'm sure of it (I dremeled the inside out pretty well and I'm using streamlines.) The barrel sometimes slightly over-rotates now though... this would be easier to explain with another picture.
This causes the darts to not fire correctly because they hit the orange piece. When this doesn't happen, the mod works great, but can anyone help me fix this? I'm sort of at a loss.
Edit: I don't know how I forgot to mention this. Also, sometimes the cocking mechanism won't go all the way back, and if I force it to, it will cock (with a loud pop) and not turn the barrel. VERY annoying. This happens maybe 10% of the time.
Edited by shirtninjas, 09 March 2011 - 12:41 PM.