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Gameplay articles
Fallout 3Mini nuke
Fallout: New VegasMini nuke
Fallout 4Mini nuke
Fallout 76Mini nuke
Fallout: BoSMini nuke grenade
This is an overview article, focusing on background information and cross-game comparisons.

Mini nuke expanded

The mini nuke is an ammunition type found in Fallout 3, Fallout: New Vegas, Fallout 4 and Fallout 76. The mini nuke grenade is found in Fallout: Brotherhood of Steel.


Developed at Fort Strong as part of the M42 Fat Man project, the mini nuke project took over a year. Despite setbacks during development, the project was completed in September 2077.[1][2] The M42s were subsequently shipped to soldiers fighting overseas.[1][3][4][5]


Mini nuke

Mini nuke.png

Gameplay articles: Fallout 3, Fallout: New Vegas

Found in both the Capital and Mojave Wastelands as well as surrounding areas.

Mini nuke

Fo4 mini nuke.png

Gameplay articles: Fallout 4, Fallout 76

A mini nuke consists of four principal components. The detonator shell, four stabilizer fins, a hemisphere core, and beryllium cap.[5] Striking the mini nuke or using other explosives around it will not result in its detonation, as it can only be utilized by firing from a Fat Man.

Mini nuke grenade

FOBoSLogo.pngThe following is based on Fallout: Brotherhood of Steel and is not canon.


The mini-nuke grenade is a mini nuke packed into a hand-held explosive device.

FOBoSLogo.pngEnd of information based on Fallout: Brotherhood of Steel.

Behind the scenes

FB8 deco 301 color.pngThe following is based on unverified behind the scenes information and may be inaccurate.

The mini nuke resembles the American W54 miniature nuclear warhead.

FB8 deco 301 color.pngEnd of information based on unverified behind the scenes information.