Are machine guns the World's fastest rapid firing weapons?

Most machine guns fire several hundred rounds in every second, they fire bullets that are much faster than the speed of sound but they can also spray several thousand bullets in 1 minute. There is a machine gun called metal storm. The metal storm is the fastest rapid firing machine gun in the World. It fires up to several thousand rounds in 1 second up to 1,000,000 rounds per minute. Metal storm have 36 barrels wiches make metal storm a very fast machine gun. The answer is yes, machine guns are the World's fastest rapid firing weapons.