[PAR] [TLE] M2 Browning [SEP] The M2 Machine Gun or Browning .50 Caliber Machine Gun is a heavy machine gun designed toward the end of World War I by John Browning.  Its design is similar to Browning's earlier M1919 Browning machine gun, which was chambered for the .30-06 cartridge.  The M2 uses the much larger and much more powerful .50 BMG cartridge, which was developed alongside and takes its name from the gun itself (BMG standing for "Browning Machine Gun").  It has been referred to as "Ma Deuce", in reference to its M2 nomenclature.  The design has had many specific designations; the official designation for the current infantry type is Browning Machine Gun, Cal.  .50, M2, HB, Flexible.  It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications and low-flying aircraft.  The M2 has been produced longer than any other machine gun. [PAR] [TLE] Northrop P-61 Black Widow [SEP] The Northrop P-61 Black Widow, named for the American spider, was the first operational U.S. warplane designed as a night fighter, and the first aircraft designed to use radar.  The P-61 had a crew of three: pilot, gunner, and radar operator.  It was armed with four 20 mm (.79 in) Hispano M2 forward-firing cannons mounted in the lower fuselage, and four .50 in (12.7 mm) M2 Browning machine guns mounted in a remote-controlled dorsal gun turret.
[PAR] [TLE] M2 Browning [ SEP ] The M2 Machine Gun or Browning .50 Caliber Machine Gun is a heavy machine gun designed toward the end of World War I by John Browning . Its design is similar to Browning 's earlier M1919 Browning machine gun , which was chambered for the .30 - 06 cartridge . The M2 uses the much larger and much more powerful .50 BMG cartridge , which was developed alongside and takes its name from the gun itself ( BMG standing for " Browning Machine Gun " ) . It has been referred to as " Ma Deuce " , in reference to its M2 nomenclature . The design has had many specific designations ; the official designation for the current infantry type is Browning Machine Gun , Cal . .50 , M2 , HB , Flexible . It is effective against infantry , unarmored or lightly armored vehicles and boats , light fortifications and low - flying aircraft . The M2 has been produced longer than any other machine gun . [PAR] [TLE] Northrop P-61 Black Widow [ SEP ] The Northrop P-61 Black Widow , named for the American spider , was the first operational U.S. warplane designed as a night fighter , and the first aircraft designed to use radar . The P-61 had a crew of three : pilot , gunner , and radar operator . It was armed with four 20 mm ( .79 in ) Hispano M2 forward - firing cannons mounted in the lower fuselage , and four .50 in ( 12.7 mm ) M2 Browning machine guns mounted in a remote - controlled dorsal gun turret .
The Northrop P-61 Black Widow had a gun mounted that was designed by whom?
The Northrop P-61 Black Widow had a gun mounted that was designed by whom ?
John Browning
John Browning