Mark IV

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Mark IV or Mark 4 often refers to the fourth version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk."

Mark IV or Mark 4 can specifically refer to:

In technology[edit]

In military and weaponry[edit]

  • Webley Mk IV, also known as the "Boer War Model"; .455 caliber British revolver from 1899
  • Mark IV tank, an up-armoured variant of the British Mark I tank, 1917.
  • Vickers Tank Periscope MK.IV (1936); widely used periscope designed in Poland
  • Bristol Blenheim Mk.IV; light bomber in Royal Air Force service before and during World War II, the most numerous Blenheim variant
  • Mark 4 nuclear bomb (1949–1953); an American nuclear bomb
  • Mk IV Turtle helmet (1950s–1980s); British Army standard helmet; a slight design change from the Mk III Turtle helmet
  • Merkava Mark IV (1999); main battle tank of Israel Defense Forces
  • Navy Mark IV (late 1950s–early 1960s); a full pressure suit designed for unpressurized military jets; modified by NASA for Project Mercury astronauts

Other vehicles[edit]

Other technologies[edit]

Other uses[edit]