38 cm SK C/34 naval gun
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The 38 cm SK C/34 naval gun was developed by Germany mid to late 1930s. It armed the Bismarck-class battleships and was planned as the armament of the O-class battlecruisers and the re-armed Scharnhorst-class battleships. Wikipedia
Breech: horizontal sliding-block
Caliber: 380 millimetres (15 in)
Effective firing range: 36.5 km (22.7 mi) with 800 kg (1,800 lb) shell at 30° elev
Elevation: -5.5° to +30°
Length: 19.63 m (64 ft 5 in)
Mass: 111 tonnes (109 long tons; 122 short tons)
Muzzle velocity: 820 m/s (2,700 ft/s)