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R-21
Photo: Johnny Rotten · Wikimedia Commons · Public domain
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R-21

SLBM · Russia · 1963
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R-21

R-21
R-21 Photo: Johnny Rotten · Wikimedia Commons · Public domain
MASS (Military Archive Scoring System) 54
* Absolute score — assessed within category · no era adjustment
Range
0
Payload / MIRV
0
Accuracy
0
Platform Survivability
0
BMD Penetration
0
Readiness
0
Reliability
0
Second-Strike Value
0
Strategic Impact
0
Technology
0
Methodology ↗ → SLBM ranking
Origin Russia
ManufacturerMakeyev Rocket Design Bureau
CategorySLBM
EraCold War
In service1963
Operators2 countries
⬇ Overview
⚙ Specs
⊕ History
⊕ Operators
⚖ MASS Score
📚 Sources
Data Quality85%
01 / Overview
R-21
Category
SLBM
Country
Russia
Prime contractor
Makeyev Rocket Design Bureau
Production
1963–
Operators
2 countries
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
SLBM · COLD WAR
9
PERFORMANCE/PRICE
38
UNIT COST (2025 USD)
—
MASS SCORE ↗
54
slbm category
ⓘ Performance/Price and MASS score are computed across all units in the slbm category, regardless of era.
02 / Specs & Design
03 / History
SERVICE LIFESPANStill in Service
  1. 1963Production started
63
years in service
1
countries operating
ⓘ 1 countries retired it.
04 / Operators
Operator Countries2country
North KoreaACTIVERussiaRETIRED
SLBM Cold War Russia Makeyev Rocket Design Bureau
📚 Sources
📖 ENCYCLOPEDIA Browse the SLBM entry →