The A-10’s gatling gun is MASSIVE.
https://www.businessinsider.com/how-the-a10-warthog-gau8-gatling-gun-really-works-2021-5?op=1
the A-10 Thunderbolt II is, basically, an airplane built around the GAU-8 Avenger 30-mm hydraulically driven seven-barrel Gatling-type cannon.
The Avenger cannon is the Hog primary weapon and is able to fire 3,900 bullets per minute.
https://www.youtube.com/watch?v=33teK7L4DM4
Ok, I’ll give you that, the plane itself is not that big. I know, I see them all the time.