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12.7cm Twin Mount Type-B Kai 2

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12.7cm Twin Mount Type-B Kai 2

No.63 12.7cm連装砲B型改二

Small Caliber Main Gun Main Cannon, Light

Effects: Firepower+3, Anti-Air+2, Range Short

Scrap Value: Ammunition1, Steel2

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



"This is a minor change version of the main gun of the fleet destroyer armament.

Like the basic form, but shielding the entire circumference with the mantlet, which protected from bullet and stormy weather, also in this version has been improved higher elevation range.

It is also said to have been mounted on many destroyer squadron."

Historical information

This gun is the modified version of the twin gun Model B which was used by Ayanami-class and Akatsuki-class destroyer. The main difference between the Type A and Type B is that instead of the former's elevation range of −5° to +40°, type B's range is upgraded to 75°, which is required for the more complicated and effective AA systems installed on newer destroyers. Type B armour, however, was too thin to withstand heavy seas and splinter damage, thus the Type B Kai was introduced, adding more protection.

First mounted on Hatsuharu-class destroyers, but the effectiveness is unknown.


Unbuildable. Can be "gained" using Akashi's Arsenal. Stock equipment of Yuudachi Kai Ni, Ayanami Kai Ni, Harusame Kai, Hatsuharu Kai Ni, Umikaze Kai, Kawakaze Kai, Kawakaze Kai Ni, Ooshio Kai Ni, and Oyashio Kai. Ranking reward for top 20-100 in October 2013.

Fit Bonuses
The 12.7cm Twin Mount Type-B Kai 2 provide the following bonuses to member of the Type II, Type III New Type Destroyers of the Ayanami-class, and Akatsuki-class along with the Hatsuharu-class DD:

+1 Icon AA.png

Unique Bonuses
When equipped to specific members of the Shiratsuyu-class DD the following bonuses occur:

Akashi's Improvement Arsenal

Type Name Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Development material.png Improvement Materials.png # of equipment needed for that upgrade. An asterisk following the number indicates a different equipment is required. Sun Mon Tue Wed Thu Fri Sat
Small Caliber Main Gun 12.7cm Twin Mount Type-B Kai 2 0 10 60 100 0 2/2 2/3 - X X X X Yuudachi Kai Ni
Ayanami Kai Ni
6 2/2 2/4 1
10 - - -

See Also

12.7 cm/50 Type 3 naval gun (the later part)