auto177buy LEGENDS MP FULL AUTO on. In 1938, the German MP 40 revolutionized submachine-gun desn. Now, more than 70 years after the end of World War II, The Legends MP captures that classic look in an air gun thatWhat is full auto? A fully automatic (or full auto) bb gun constantly sends ammo downrange when the trger is squeezed and only stops when the trger is released, CO2 runs out or the ammo