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12.7 cm/50 Type 3 gun
Photo: Unknown author · Wikimedia Commons · Public domain
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12.7cm/50Type3gun

Naval Guns · Japan · 1928
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12.7cm/50Type3gun

12.7 cm/50 Type 3 gun
12.7 cm/50 Type 3 gun Photo: Unknown author · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Rate of Fire
60
Range
50
Lethality
75
Accuracy
65
Ammunition Versatility
70
Multi-Role Capability
40
Reliability
80
Automation
30
Technology
50
Cost-Effectiveness
75
Origin Japan
CategoryNaval Guns
EraInterwar Period
In service1928–1966
Operators3 countries
Quantity700
Data Quality88%
MASS(Military Archive Scoring System)
60
Naval Guns MASS Rating
9/40
Interwar Period
40/280
All-Time
Naval Guns · 10 axes scored
Rate of Fire
60
Range
50
Lethality
75
Accuracy
65
Ammunition Versatility
70
Multi-Role Capability
40
Reliability
80
Automation
30
Technology
50
Cost-Effectiveness
75
ⓘ Regardless of era, the same scoring system applies to all units in the naval guns category.
01 / Overview
12.7 cm/50 Type 3 gun
Category
Country
Production
1928–1966
Quantity
700
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
NAVAL GUNS · INTERWAR PERIOD
9
PERFORMANCE/PRICE
78
UNIT COST (2025 USD)
—
60
naval guns category
ⓘ Performance/Price and MASS score are computed across all units in the naval guns category, regardless of era.
02 / Specs & Design
◎General6MOD.6
  • Weapon Typenaval gun
  • Service Entry Year1928
  • Weight4,205 kg
  • Length6.483 m
  • Diameter127 mm
  • In ServiceYes
◈Guidance & Homing5MOD.5
▣Performance3MOD.3
  • Propulsion Typebagged propellant
  • Maximum Range (gun)18.4 km
  • Rate of Fire (gun)7.5
◇Warhead5MOD.5
  • Warhead Typehigh-explosive fragmentation
  • Warhead Weight23 kg
  • Explosive Filler1.88 kg
  • Fuze Typemanual
  • Nuclear-CapableNo
◆Platform4MOD.4
▤Production2MOD.2
  • Total Production700
  • Operators3
⬢Warhead Detail3MOD.3
  • Detonation Mechanism / Fuzeimpact
  • Explosive Filler Weight1.88 kg
  • Explosive Filler Type30 DC propellant
03 / History
SERVICE LIFESPANStill in Service
  1. 1928Production started
  2. 1939First deployment: World War II
  3. 1966Production ended
98
years in service
38
years in production
700
units produced
1
countries operating
ⓘ The producing country still actively operates it. 2 countries retired it.
04 / Operators
Operator Countries3country
12.7 cm/50 Type 3 gunSALES1records
YearBuyerQuantityAmountPresent Value (2025)
—Russia2——
ⓘ "Present Value" is an estimated amount adjusted for inflation.
📖 TERMS ON THIS PAGE2terms
Surface ship from which a torpedo is launched, typically a destroyer, cruiser, or dedicated torpedo boat.
Ship-launched: a torpedo designed to be deployed from surface warships using onboard launch tubes or deck-mounted launchers.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Naval Guns entry →