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The Guarantee

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The Guarantee
Survival Fatman TheGuarantee.png
TypeExplosive heavy gun
DamageSee main article
Damage TypeExplosive
Special Effects
  • Double damage if target is full health
  • +50% limb damage
  • 15% faster reload
Weapon Modification
Weapon VersionsFat Man

The Guarantee is a unique weapon in Fallout 76.


A special legendary weapon received for completing Survival challenges. As expected, it's very powerful, with guaranteed multiple legendary effects. As expected, it's only available in Survival mode.


Main article: Fat Man (Fallout 76)


  • Survival mode reward, available April 16–22.