Wrong. The F-15, F-16, F/A-18, F22 and USAF F-35A, all fighter aircraft, mount a single internal cannon. Naval and Marine F-35s do not have internal cannon, but can mount them in external pods. Everything in the list above uses the M61 Vulcan rotary cannon and the F-35A uses a GAU-22/U Equalizer cannon, a variant of…