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Prototype 51cm Twin Gun Mount

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Prototype 51cm Twin Gun Mount

No.128 試製51cm連装砲

Large Caliber Main Gun Main Cannon, Heavy (II)

Effects: Firepower+30 Anti-Air+5 Accuracy+1 Evasion-1 RangeVery Long

Scrap Value: Ammunition30 Steel28

Refittable Class
Destroyer Amphibious Assault Ship
Light Cruiser Torpedo Cruiser
Heavy Cruiser Aviation Cruiser
Battleship Aviation Battleship
Fast Battleship Seaplane Tender
Light Carrier Standard Carrier
Armored Carrier Submarine
Submarine Carrier Submarine Tender
Repair Ship Training Cruiser
Fleet Oiler Destroyer Escort
Can be equipped only to Yamato- & Nagato-class. The latter has to be remodelled.



"Yamato" kai type, the development of a Super Yamato class main gun have been developed as one of the largest caliber gun ever to be fitted on a warship.

The 51cm Guns achieved a firepower that overwhelmed the firepower of the other battleship's main guns. As the gun surpasses even the weight and size of the 46cm guns, only limited battleships are able to equip this gun.


Unbuildable. Winter 2015 Event E-2 Hard reward.

See also

51 cm/45 (20.1") "A" Type 98 (?)