The new $104 million F-35B stealth fighter has been armed with the GAU-22 Gatling gun with a 55 rps rate of fire. The sound of the cannon alone is simply devastating or empowering depending on which side of the barrel you’re sitting on. Unlike the wing mounted weapons on the Air Force’s F-35A, the guns of the Marines’ F-35B must be mounted externally. See the first firing tests of this deafening weapon in the video below.