Type 4 20 mm Twin AA Machine Cannon

Type 4 20 mm Twin AA Machine Cannon was a Japanese Anti-aircraft gun. It consisted of two Type 98 20 mm guns. It was introduced in 1944 and approximately 500 guns were produced.
 * Caliber: 20 mm
 * Barrel length: 1.4 m (L70)
 * Muzzle velocity: 950 m/s
 * Range: 5,500 mm
 * Altitude: 3,500 m
 * Rate of fire: 600 round/min