12.7cm Twin Gun Mount

[Edit] 12.7cm Twin Gun Mount No.2 12.7cm連装砲
Small Caliber Main Gun Effects: +2 +2 Short Scrap value: 1 2 (Buildable)
Refittable Ship Types
Fast Battleship	Battleship
Aviation Battleship	Standard Aircraft Carrier
Armored Carrier	Light Carrier
Heavy Cruiser	Aviation Cruiser
Light Cruiser	Torpedo Cruiser
Training Cruiser	Destroyer
Coastal Defense Ship	Submarine
Aircraft Carrying Submarine	Seaplane Tender
Fleet Oiler	Submarine Tender
Repair Ship	Amphibious Assault Ship

Mechanics

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

• Most main guns come with "Hidden Fit Bonuses/Penalties", especially larger ones.
• Small Caliber Main Guns bring some accuracy bonus against PT boats.

Notes

How To Obtain

Buildable

Stock equipment of: Akatsuki, Akebono, Akigumo, Akishimo, Amagiri, Amatsukaze, Arare, Arashio, Arashi, Ariake, Asagumo, Asashimo, Asashio, Ayanami, Chitose Kai, Chiyoda Kai, Fujinami, Hagikaze, Hamakaze, Hamanami, Harusame, Hatsuharu, Hatsukaze, Hatsushimo, Hayanami, Hayashimo, Hibiki, Ikazuchi, Inazuma, Isokaze, Kagerou, Kasumi, Kawakaze, Kazagumo, Kishinami, Kiyoshimo, Kuroshio, Maikaze, Makigumo, Makinami, Michishio, Minegumo, Murasame Kai, Murasame, Naganami, Nenohi, Nowaki, Oboro, Okinami, Ooshio, Oyashio, Sagiri, Samidare, Sazanami, Shigure, Shikinami, Shimakaze, Shiranui, Shiratsuyu, Suzukaze, Suzunami, Takanami, Tanikaze, Tokitsukaze, Umikaze, Urakaze, Ushio, Wakaba, Yamagumo, Yamakaze, Yukikaze, Yuudachi Kai, Yuudachi, Yuugumo, Hayashio,Yuugure, Yuugure Kai

Uses

Used to improve: 12.7cm Twin Gun Mount, 12.7cm Twin Gun Mount Model B Kai 2, 12.7cm Single Gun Mount, 120mm/50 Twin Gun Mount, 12.7cm Single High-angle Gun Mount (Late Model), 12.7cm Twin Gun Mount Model C Kai 2, QF 4.7inch Gun Mk.XII Kai, 130mm B-13 Twin Gun Mount, 12.7cm Twin Gun Mount Model A 12.7cm Twin Gun Mount Model C Kai 3

Used by quest: F96, F120

Updates History

• 2013-04-23: Implemented with initial game release
• 2014-10-24: Became improvable and upgradeable to 12.7cm Twin Gun Mount Model B Kai 2
• 2018-06-29: Became upgradeable to 12.7cm Twin Gun Mount Model A Kai 2
• 2018-08-17: No longer upgradeable to 12.7cm Twin Gun Mount Model A Kai 2, card CG updated

Improvement

12.7cm Twin Gun Mount
Improvement			→	Conversion
★ Improvement Level	0~5	6~9		12.7cm Twin Gun Mount Model B Kai 2
Consumed	1/2	1/2		2/3
Consumed	1/2	1/2		3/6
Equipment Consumed	-			x2
Items Consumed	-			-
Resources	10 30 60 0

Ship Helper	Conversion
Any	12.7cm Twin Gun Mount Model B Kai 2
Mon		Tue	Wed	Thu	Fri	Sat	Sun

Improvement effects
	1★	2★	3★	4★	5★	6★	7★	8★	9★	Max★
	1.00	1.41	1.73	2.00	2.23	2.44	2.64	2.82	3.00	3.16
	1.00	1.41	1.73	2.00	2.23	2.44	2.64	2.82	3.00	3.16
Day	1.00	1.41	1.73	2.00	2.23	2.44	2.64	2.82	3.00	3.16
Night	1.30	1.84	2.25	2.60	2.91	3.18	3.44	3.68	3.90	4.11

Trivia

The main gun for most post-Mutsuki class Japanese destroyers save for the Akizuki, Matsu, and Tachibana classes. Had four major variants denoted A, B, C, and D respectively (A being the oldest), the main differences between the variants being the weight and the gun's elevation angle. Type A was limited to 40deg. elevation and was quite useless when it came to the AA role. The maximum elevation angle was raised to 75deg. for the B- and D-types while the C-type was capable of 55deg. Unfortunately, the firing rate at high elevation angles was very low since the loading sequence required hand ramming, which made Japanese destroyers vulnerable to aerial attacks.