The A-10's GAU-8 cannon can fire 4,200 rounds per minute. The gun is the size of a mid-size car and was too big to mount on any aircraft at the time. Therefore, the A-10 was designed around the gun itself, instead of vice versa.

The A-10's GAU-8 cannon can fire 4,200 rounds per minute. The gun is the size of a mid-size car and was too big to mount on any aircraft at the time. Therefore, the A-10 was designed around the gun itself, instead of vice versa.