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12.7cm Single Gun Mount

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No.78 12.7cm単装砲
RedGunLight.png Small Caliber Main Gun
Effects: Firepower+2 Accuracy+1 RangeShort
Scrap value: Ammo 1 Steel 1 (Buildable)

Equipment Card 12.7cm Single Gun Mount.png

Equipment Character 12.7cm Single Gun Mount.png

Equipment Item 12.7cm Single Gun Mount.png

Equipment Full 12.7cm Single Gun Mount.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 was the main gun of destroyers from that country, it was equipped on the Z1 class of destroyers.
Although it was just a single-mount, it was a good gun for anti-ship and anti-ground shelling.
Unfortunately, this gun is unsuited for anti-air combat.


Main GunsSmall Caliber Main GunMedium Caliber Main GunLarge Caliber Main Gun are the main armement 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).


Not to be confused with 12.7cm Twin Gun Mount.

How To Obtain

Buildable using a Type 1934-class as Secretary

Stock equipment of: Z1 KaiZ1 Kai, Z1 ZweiZ1 Zwei, Z1Z1, Z3 KaiZ3 Kai, Z3 ZweiZ3 Zwei, Z3Z3


Used to improve: 12.7cm Single Gun Mount12.7cm Single Gun Mount

Updates History

  • 2014-03-14: Implemented
  • 2014-03-28: Card CG updated
  • 2020-11-13: Became buildable, became improvable, visible bonuses added

Fit Bonuses

Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Evasion Note
Type 1934-ClassZ1
(★0-6) +1 +1
(★7-9) +2 +1
(★MAX) +2 +1 +1
+ LOS Radar +2 +2 +2


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 Single Gun Mount 0 10 20 70 10 3/3 1/2 1xRedGunLight.png Z1
6 4/5 2/3 1xRedGunLight.png
10 - - -
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

See Also

12.7 cm SK C/34 naval gun