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3.7 cm SK C/30

3.7 cm SK C/30

The 3.7 cm SK C/30 was the German Kriegsmarine's primary 3.7 cm anti-aircraft gun during the Second World War. It was superseded by the fully automatic 3.7 cm FlaK 43 late in the war. Wikipedia
Action: single-shot
Caliber: 37 x 380 mm R
Effective firing range: 2,000 m (6,600 ft) (effective ceiling)
Elevation: depends on the mount
Length: 3.074 metres (10 ft 1 in)
Maximum firing range: 8,500 m (9,300 yd) at 37.5°
Rate of fire: 30 rpm (practical)