page_title: 37 mm automatic air defense gun M1939 (61-K)
section_title: Variants
hierarchical_section_title: 37 mm automatic air defense gun M1939 (61-K) / Variants
caption_attribution_description: Jessore 2015.
context_page_description: The 37 mm automatic air defense gun M1939 (61-K) is a Soviet 37 mm calibre anti-aircraft gun developed during the late 1930s and used during World War II. The land-based version was replaced in Soviet service by the AZP S-60 during the 1950s. Guns of this type were successfully used throughout the Eastern Front against dive bombers and other low- and medium-altitude targets. It also had some usefulness against lightly armoured ground targets. Crews of the 37 mm AD guns shot down 14,657 Axis planes. The mean quantity of 37 mm ammunition to shoot down one enemy plane was 905 rounds.
context_section_description: Norinco (Chinese)
   
  Type 55 – copy of the single barreled 37 mm M1939
  Type 63 – twin 37 mm guns with vertical stabilization mounted on a T-34 chassis.
  Type 65 – copy of the twin barreled 37 mm.
  Type 74 – upgraded version of the Type 65 with a greater rate of fire.
  Type 74SD – Type 74 with servo system removed for operation with Type 800 laser course director system.
  Type 79-III – upgraded version of the Type 74 with electro-optical director, and powered traverse and elevation.
  Type 76 – Naval version of the twin 37 mm.
  P793 – Advanced twin-barrel version, with electro-optical predicting sight and higher rate of fire and lengthened barrels giving a higher muzzle velocity (1,000 m/s). Operated by a crew of 5 or 6.
  North Korea
  Self-propelled version
caption: Type 74 of Bangladesh Army.
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