The Parabellum Machine gun:
Original design: Karl Heinemann
German Manufacturing: Deutsche Waffen und Munitionsfabrik AG
Length: 48.13 in
Weight: unloaded, 21.6 lbs; air version was lighter
Barrel: 27.75 in; 4 grooves right hand twist
Magazine (for aerial use): fabric shot belt
Rate of fire: 650-750 rpm
Muzzle velocity: 2,925 fps; 892 mps
Curious note about the origin of "parabellum." It was
a lighter version of the Maxim, and when produced it
was named for the Latin phrase: Si vis pacem, para
bellum....... If you wish for peace, prepare for war.
Picture shows twin Parabellums on a ring mount
photo: "Fighter Aircraft of the 1914-1918 Air War"