This is mostly a nitpick of mine but having the gatling gun its own sounds would make it sound like it's own thing rather than reusing the gun's sounds. It also makes it possible to change the gatling gun's sounds with a resource pack without having it to affect the gun's sounds.

Fair, it's just not high on my priorities so that may take a while.

Sound event separated in new update (2.5.0). Since it's still the old sound I'm leaving that open if I get inspiration/a good sound to replace it.