Who invented Machine Gun Kelly's favorite weapon?
Machine Gun Kelly: George Kelly Barnes (July 18, 1895 – July 18, 1954), better known as "Machine Gun Kelly", was an American gangster from Memphis, Tennessee, during the prohibition era. Machine Gun Kelly:  His nickname came from his favorite weapon, a Thompson submachine gun. Thompson submachine gun: The Thompson submachine gun is an American submachine gun, invented by John T. Thompson in 1918, that became infamous during the Prohibition era.
i don't know