D
Nuclear ForcesUnited States

B83-1

Nuclear gravity bombActivePending verification
Nuclear ForcesUSA
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Fact cardConfidence · Source
System
TypeNuclear gravity bomb
ProliferationOrigin country only
Delivery
Delivery systemsB-2AMed[1]
Yield1,200 ktUp to 1.2 megatonsMed[1]
Summary

Highest-yield U.S. weapon, still listed active in the FY2026 budget.

Draft entry. Values come from the cited public sources and are awaiting editor verification.
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Operators
United States
Sources
  1. United States nuclear weapons, 2026, Federation of American Scientists Nuclear Notebook, Bulletin of the Atomic Scientists
    Published/updated 2026-03-01 · Tier 2 · checked 2026-11-08
Change log
  • 2026-11-08 Entry created from United States nuclear weapons, 2026 (FAS Nuclear Notebook)