• Welcome to the Kancolle Wiki!
  • If you have any questions regarding site content, account registration, etc., please visit the KanColle Wiki Discord

12.7cm Twin Gun Mount Model B Kai 2

From Kancolle Wiki
Jump to navigation Jump to search
No.63 12.7cm連装砲B型改二
RedGunLight.png Small Caliber Main Gun
Effects: Firepower+3 AA+2 RangeShort
Scrap value: Ammo 1 Steel 2 (Unbuildable)

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 Ship Destroyer
Light Cruiser Torpedo Cruiser
Heavy Cruiser Training Cruiser
Aviation Cruiser Fast Battleship
Battleship Aviation Battleship
Light Carrier Standard Aircraft Carrier
Armored Carrier Seaplane Tender
Submarine Aircraft Carrying Submarine
Submarine Tender Fleet Oiler
Repair Ship Amphibious Assault Ship



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


Main GunsSmall Caliber Main GunMedium Caliber Main GunLarge Caliber Main Gun are the main armament used by surface ships. Their main stats are the "firepower" Firepower and "accuracy" Accuracy. They are notably required to trigger all Artillery Spotting attacks as well as some Night Cut-Ins, notably the "Double Attack" (DA).


How To Obtain

Stock equipment of: Amagiri KaiAmagiri Kai, Ayanami Kai NiAyanami Kai Ni, Ayanami KaiAyanami Kai, Harusame KaiHarusame Kai, Hatsuharu Kai NiHatsuharu Kai Ni, Kawakaze Kai NiKawakaze Kai Ni, Kawakaze KaiKawakaze Kai, Ooshio Kai NiOoshio Kai Ni, Oyashio KaiOyashio Kai, Sagiri KaiSagiri Kai, Shikinami Kai NiShikinami Kai Ni, Umikaze KaiUmikaze Kai, Yamakaze KaiYamakaze Kai, Yuudachi Kai NiYuudachi Kai Ni

Upgradeable from: 12.7cm Twin Gun Mount12.7cm Twin Gun Mount

From quest: B112 (x2, choice), B124 (x3, choice), C42 (choice)

Ranking reward for:

  • Sep 2013: 支援艦隊
  • Oct 2013: 21-100


Used to improve: 12.7cm Twin Gun Mount Model B Kai 212.7cm Twin Gun Mount Model B Kai 2, 12.7cm Twin Gun Mount Model C Kai 212.7cm Twin Gun Mount Model C Kai 2, QF 4.7inch Gun Mk.XII KaiQF 4.7inch Gun Mk.XII Kai, 12.7cm Twin Gun Mount Model B Kai 4 (Wartime Modification) + Anti-Aircraft Fire Director12.7cm Twin Gun Mount Model B Kai 4 (Wartime Modification) + Anti-Aircraft Fire Director

Used by quest: F78

Updates History

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
YuudachiYuudachi +1 +1 +2
Kai NiYuudachi Kai Ni +1
Shigure Kai NiShigure Kai Ni +1
Kawakaze Kai NiKawakaze Kai Ni +2
Shiratsuyu Kai (Ni)Shiratsuyu Kai
Shiratsuyu Kai Ni

Murasame Kai (Ni)Murasame Kai
Murasame Kai Ni
Shikinami Kai NiShikinami Kai Ni +1 +1
Amagiri Kai Ni (D)Amagiri Kai Ni
Amagiri Kai Ni D
+2 +1
Other Ayanami-classAyanami




Type Name Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.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 40 70 0 2/2 2/3 - X Y
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
Improvement Improved effects
Small Caliber Main Gun 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Night Battle Power 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16


This gun is the modified version of the twin-gun Model B which was used by Ayanami-class and Akatsuki-class destroyers. The main difference between 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 armor, 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.

See Also

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