I had modelled some weapons (Gatling gun, bofors, Howitzer), so I have set up a quick AC130 variant.
Again this is not even pretending to be accurate, it is the bare minimum.
I guess the weapon configuration is that of the AC-130 'spooky'. I might add some of the sensor, radar, and observation domes, to make the model look more interesting (and lets face it I have a ton of space left on the texture).