Has anyone tried the MIRV weapons mod on the fat man yet?
The experimental MIRV is a unique Fat Man that can be found in the bomb shelter area in the National Guard depot. This weapon deals the most damage of any weapon in the entire game, as it acts like a shotgun version of the Fat Man, delivering eight mini nukes at once. The MIRV actually does the same damage as a Fat Man per mini nuke, as 12,880/8 equals 1,610. This means that the MIRV is simply a Fat Man with extra capacity and increased ammunition usage. It will not fire if you don't have at least 8 mini nukes in your inventory to load it with. If you have fewer than 8 mini nukes, the weapon will reload but never discharge the payload.