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12 inch/50 Mark 7 gun
Photo: United States Navy · Wikimedia Commons · Public domain
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12inch/50Mark7gun

Naval Guns · United States · 1912
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12inch/50Mark7gun

12 inch/50 Mark 7 gun
12 inch/50 Mark 7 gun Photo: United States Navy · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Rate of Fire
40
Range
55
Lethality
75
Accuracy
60
Ammunition Versatility
50
Multi-Role Capability
20
Reliability
80
Automation
10
Technology
30
Cost-Effectiveness
60
Origin United States
CategoryNaval Guns
EraPre-WWI / Industrial Age
In service1912
Operators2 countries
Quantity28
Data Quality87%
MASS(Military Archive Scoring System)
51
Naval Guns MASS Rating
5/131
Pre-WWI / Industrial Age
72/280
All-Time
Naval Guns · 10 axes scored
Rate of Fire
40
Range
55
Lethality
75
Accuracy
60
Ammunition Versatility
50
Multi-Role Capability
20
Reliability
80
Automation
10
Technology
30
Cost-Effectiveness
60
ⓘ Regardless of era, the same scoring system applies to all units in the naval guns category.
01 / Overview
12 inch/50 Mark 7 gun
Category
Production
1912–
Quantity
28
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
NAVAL GUNS · PRE-WWI / INDUSTRIAL AGE
5
PERFORMANCE/PRICE
44
UNIT COST (2025 USD)
—
51
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 Year1912
  • Weight56,300 kg
  • Length15.24 m
  • Diameter304.8 mm
  • In ServiceYes
◈Performance3MOD.3
  • Range21.854 km
  • Maximum Range (gun)27.43 km
  • Rate of Fire (gun)2.5
▣Warhead1MOD.1
  • Warhead Weight394.6 kg
◇Platform2MOD.2
◆Production1MOD.1
  • Total Production28
▤Warhead Detail1MOD.1
  • Explosive Filler TypeCommon projectiles
03 / History
SERVICE LIFESPANRetired
  1. 1912Production started
  2. 1914First deployment: World War I
114
years in service
28
units produced
0
countries operating
ⓘ 2 countries retired it.
04 / Operators
Operator Countries2country
📖 TERMS ON THIS PAGE1terms
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 →