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Japanese Type 89 (1929) 127mm Anti-Aircraft Gun
Technical Information

Largest Japanese naval anti-aircraft / dual purpose gun, also known as 12.7cm gun.  Originally designed for use on ships, but but also placed in dual mounts at land installations. The gun is well shielded, and traverse and elevation by electric motor. Semi-automatic, with a horizontal wedge type breech block and automatic rammer and fuse setter.

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Technical Details
Caliber 127mm (5")
Muzzle Velocity 2,360 feet/sec
Shell 14 1/2 lbs
Rate of Fire 12 rpm (per barrel)
Vertical Range  24,300 feet
Horizontal Range  15,400 yards
Total Weight  25.3 Tons (aprox)
Ammunition  HE, AP (50.5 lbs)
  Type 91 55, 30 sec

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