The AirSource Military recently posted up this video of an AC-130U during live-fire training.

The Spooky II is armed with

• 1× General Dynamics 25 mm (0.984 in) GAU-12/U Equalizer 5-barreled Gatling cannon
• 1× 40 mm (1.58 in) L/60 Bofors cannon
• 1× 105 mm (4.13 in) M102 howitzer

105mm rounds

40mm rounds

Topping off the hopper of 40mm ammo.

105mm howitzer

Enjoy the video.