The latest version...
The AC-130U is armed with a 25mm Gatling-gun (capable of firing 1800 rounds per minute), a single-barrel, rapid-fire 40mm Bofors cannon, and a 105mm Howitzer. The AC-130U replaced the two 20mm cannon used on the AC-130H with one trainable 25mm cannon while retaining the other weapons. The AC-130U employs the latest technologies and can attack two targets simultaneously.
1800 rounds a minute! That's amazing.
Why don't we use these planes in Baghdad?