40 mm/62 Vickers (40 mm)

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The 40 mm Vickers used on Type K-3 / No.1 Class firing at a close range naval target


The 40 mm/62 Vickers, also known as the 40 mm/62 Bi-Shiki, is a Japanese naval anti-aircraft gun. It is a derivative of the 40 mm 2pdr QF Mk.IIc, imported and later produced under license. It appears in both single and twin mounts, and has a 50-round magazine and access to a timed fuse HE round.

Vehicles equipped with this weapon

General info

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Available ammunition

  • Universal: HEF · APHE · HEF · APHE
  • 40 mm HE clips: HEF · HEF · HEF · APHE
  • 40 mm AP clips: APHE · APHE · APHE · HEF- Armour piercing shells, good at damaging interior modules and armoured ships
  • 40 mm HE-TF clips: HE-TF · HE-TF · HE-TF · HE-TF- Dual-fuze HE shells, meaning they are effective against both boats and aircraft, generally superior to the HEF clip
Penetration statistics
Belt Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
Universal 36 35 29 22 18 14
40 mm HE clips 36 35 29 22 18 14
40 mm AP clips 36 35 29 22 18 14
40 mm HE-TF clips 3 3 3 3 3 3

Comparison with analogues

  • 2pdr QF Mk.IIc (40 mm) - The original Vickers 40 mm AA gun, this one fires shells at a much higher velocity, but lacks any fused shells, and a larger magazine at 56 rounds.
  • 40 mm/39 Vickers-Terni mod.1915/1917 - Only equipped on large ships, this Italian pdr QF Mk.II has 25 rounds per magazine and only has access a single shell type, HE-TF. It also fires at a slightly higher velocity, but only has about half the explosive mass of the 40mm/62 Vickers.
  • 40 mm/39 Vickers-Terni mod.1915/1917, Modif.1930 - A modernized variant of the above, this one has 50 round magazines, but only access to HEF shells, which like the Italian HE-TF, has less explosive mass and higher velocity.
  • Bofors L/60 Mark 1 (40 mm) · Bofors L/60 Mark 2 (40 mm) · Bofors L/60 Mark 3 (40 mm) - The 40 mm Bofors has a much higher muzzle velocity, making it easier to aim and the ability to fire continuously, though it has a lower rate of fire.
  • 37 mm/67 70-K - Soviet AA gun similar to the Bofors, has a higher muzzle velocity and lower rate of fire. Its HEF shells have a slightly lower explosive mass.
  • 3.7 cm FlaK-Lafette C/36 - German AA gun, again similar to the Bofors. Has a higher rate of fire, but a much weaker HEF round.

Usage in battles

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Pros and cons


  • HE-TF clip is effective against both aircraft and boats
  • Good rate of fire


  • Low muzzle velocity
  • Only 50 rounds in a magazine


A licensed-built version of the British 2pdr QF Mk.II "pom-poms", the 40 mm/62 Vickers was officially designated the "BI" Type 91 indicating that the licensed version began production in the year 2591 under the Imperial calendar (1931 under the Gregorian calendar). Importation of British "pom-poms" began in 1925 with 500 guns and 200 mountings being imported. Initially fed by 50 round belts, there was an unsuccessful attempt to increase the capacity to 100 round belts. They would be the standard Imperial Japanese Navy anti-aircraft gun until 1935 when the low muzzle velocity and short effective range led to a replacement being sought. Their search led them to the French Hotchkiss 25 mm AA gun which they adopted as the 25 mm/60 Type 96. That said, just about every Japanese ship made between 1925 and 1935 was armed with the Vickers "BI" Type 91.


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See also

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  • reference to the article about the variant of the cannon/machine gun;
  • references to approximate analogues by other nations and research trees.

External links

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  • other literature.

Japan naval cannons
20 mm  JM61 · Type 98
25 mm  25 mm/60 Type 96
37 mm  Type 4 · Type 11 pattern 1922
40 mm  40 mm/62 Vickers
57 mm  Type 97
75 mm  Type 88 AA
76 mm  3-inch/40 Type 41 · 8 cm/40 3rd Year Type · 8 cm/60 Type 98
100 mm  100/65 mm Type 98 mod A
120 mm  120 mm/45 3rd Year Type · 120 mm/45 10th year type
127 mm  5 inch/40 Type 89 · 127 mm/50 3rd Year Type
140 mm  140 mm/50 3rd Year Type
152 mm  6-inch/45 Type 41 · 15 cm/50 Type 41
155 mm  155 mm/60 3rd Year Type
200 mm  20 cm 3rd year type No.1
203 mm  20 cm/50 3rd year type No.2
356 mm  36 cm/45 Type 41
40 mm  Bofors L/60 Mark 1 (USA) · Bofors L/60 Mark 2 (USA) · Bofors L/60 Mark 3 (USA)
76 mm  3 inch Mk.33 (USA) · 3-inch Mk.34 (USA)
120 mm  4,7-inch/40 Armstrong (Britain)
127 mm  5 inch/38 Mk.12 (USA)
305 mm  12-inch/45 Vickers (Britain) · 12-inch/50 Vickers (Britain)