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12.7cm Twin Mount Type-B Kai 2

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12.7cm Twin Gun Mount Model B Kai 2

No.63 12.7cm連装砲B型改二

Small Caliber Main Gun Small Caliber Main Gun

Effects: Firepower+3 Anti-Air+2

Scrap Value: Ammunition1 Steel2

Equipment Card 12.7cm Twin Gun Mount Model B Kai 2.png

Equipment Character 12.7cm Twin Gun Mount Model B Kai 2.png

Equipment Item 12.7cm Twin Gun Mount Model B Kai 2.png

Equipment Full 12.7cm Twin Gun Mount Model B Kai 2.png

Refittable Class
Coastal Defense ShipDestroyer
Light CruiserTorpedo Cruiser
Heavy CruiserAviation Cruiser
BattleshipAviation Battleship
Fast BattleshipLight Carrier
Standard CarrierArmored Carrier
Seaplane TenderSubmarine Tender
SubmarineSubmarine Carrier
Repair ShipTraining Cruiser
Fleet OilerAmphibious Assault Ship



"This is a slightly improved version of the main guns of fleet destroyers.
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." Similar to the base model, it has a shielded, enclosed turret that protects against shrapnel and stormy weather. This version has had it's maximum elevation improved.
It was equipped on the destroyer Yuudachi.

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 Amagiri Kai, Ayanami Kai, Ayanami Kai Ni, Harusame Kai, Hatsuharu Kai Ni, Kawakaze Kai, Kawakaze Kai Ni, Ooshio Kai Ni, Oyashio Kai, Sagiri Kai, Shikinami Kai Ni, Umikaze Kai, Yamakaze Kai, Yuudachi Kai Ni. 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
Kawakaze Kai Ni
Upgrades to 12.7cm Twin Mount Type-C Kai 2.
6 2/3 2/4 1xRedGunLight.png
10 4/8 4/7 3xRedGunLight.png

See Also

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