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25mm Anti-aircraft Autocannon Mount & Machine Guns

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No.505 25mm対空機銃増備
GreenGunMG.png Anti-Aircraft Gun
Effects: AA+7 Evasion+2
Scrap value: Ammo 3 Steel 2 Bauxite 1 (Unbuildable)

Equipment Card 25mm Anti-aircraft Autocannon Mount & Machine Guns.png

Equipment Character 25mm Anti-aircraft Autocannon Mount & Machine Guns.png

Equipment Item 25mm Anti-aircraft Autocannon Mount & Machine Guns.png

Equipment Full 25mm Anti-aircraft Autocannon Mount & Machine Guns.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



In the latter part of the war, many destroyers were equipped with as many 25mm anti-aircraft guns as possible, removing their rear gun, in order to counter the increasing threat of enemy aircraft.
Combining not only a large autocannon mount that takes up space, but also the relatively small single-barreled machine guns, it increases the close-range anti-aircraft firepower and protects the ship from air attacks.
※This equipment is suitable for relatively small ships such as destroyers.


Anti-Aircraft Gun AA Guns are equippable in RE. They are mainly used to provide "Anti-Air", notably via their AA Anti-Air stat. They:

  • Are notably required in most AACI.
  • Trigger a tracer-fire effect during air combat.
  • Bring an accuracy bonus against PT Imp.

"AA Rocket Launchers" may be described and displayed differently, they still behave like regular AA guns.


How To Obtain

Stock equipment of: Shigure Kai SanShigure Kai San

From quest: B192 (★+1, choice), B193 (★+2, choice)

Event reward for:

Updates History

  • 2023-06-14: Implemented

Fit Bonuses

25mm Anti-aircraft Autocannon Mount & Machine Guns/Bonuses


Improvement Improved effects
Anti-Aircraft 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
Torpedo Attack 1.2 1.69 2.07 2.40 2.68 2.93 3.17 3.39 3.60 3.79
[math]\displaystyle{ \text{AdjAA}_\text{ship} }[/math] 4.00 5.66 6.93 8.00 8.94 9.80 10.58 11.31 12.00 12.65
Accuracy Torpedo 2.00 2.82 3.46 4.00 4.47 4.89 5.29 5.65 6.00 6.32

See Also