mikefictiti0us posted an amazing video, showing his WIP AC-130U addon in the BI Forums.
Here's some video demonstrating the weapons of the AC-130U that I'm currently working on.
I have yet to make a model, nor have I figured out how to get the AI to orbit a specific area, so at the moment I'm using a heli config so the AI pilot doesn't crash and burn. I'll hopefully nail orbits some time this week.