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5inch Single Gun Mount Mk.30 Kai + GFCS Mk.37

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No.308 5inch単装砲 Mk.30改+GFCS Mk.37
GreenGunDP.png Small Caliber Main Gun (High-angle + Fire Director)
Effects: Firepower+3 AA+11 Armor+1 Accuracy+6 Evasion+2 LoS+3 RangeMedium
Scrap value: Ammo 2 Steel 22 Bauxite 28 (Unbuildable)

Equipment Card 5inch Single Gun Mount Mk.30 Kai + GFCS Mk.37.png

Equipment Character 5inch Single Gun Mount Mk.30 Kai + GFCS Mk.37.png

Equipment Item 5inch Single Gun Mount Mk.30 Kai + GFCS Mk.37.png

Equipment Full 5inch Single Gun Mount Mk.30 Kai + GFCS Mk.37.png

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



An excellent dual-purpose gun developed and deployed by the US.
This is the improved version of the gun extensively used by US destroyers in single gun mounts.
This particular version is linked with a fire control system and RADAR. It was also adopted as the main gun of the Fletcher-class destroyers and displays excellent anti-ship and anti-air capabilities.


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).

High-Angle Gun High-Angle Guns (sometimes "dual-purpose guns"), are anti-air focused guns, that can serve their main surface role, in addition to having extra Anti-Air AA stats.

  • They are notably required in most AACI.
  • Is required for AACI n° 34, 35.


How To Obtain

Upgradeable from: 5inch Single Gun Mount Mk.30 Kai5inch Single Gun Mount Mk.30 Kai

Ranking reward for:

  • Aug 2018: 1-5 (x2), 6-20, 21-100, 101-500

Event reward for:

Updates History

  • 2018-09-28: Implemented as ranking reward

Fit Bonuses

5inch Single Gun Mount Mk.30 Kai + GFCS Mk.37 Equipment Bonuses
Ship Extra Requirement Firepower Torpedo Attack Anti-Air Anti-Submarine Warfare Line of Sight Armor Accuracy Evasion Note
United States NavyFletcher
Heywood L. Edwards
Samuel B. Roberts
Dan Yang / Yukikaze Kai NiDan Yang
Yukikaze Kai Ni
- +2 +1 +1
Other United States Navy Vessels - +1 +1 +1
All DE - +1 +1
Other DD - +1

See Also