Experimental MIRV

The Experimental MIRV is a unique weapon $$

Gameplay
The Experimental MIRV is a unique variant of the Fat Man. This weapon deals the most base damage of any weapon in the game. It acts like a shotgun version of the Fat Man, firing eight Mini Nukes at once with a much greater spread. It will not fire if the Lone Wanderer doesn't have at least 8 Mini Nukes in their inventory to load it with. If they have fewer than eight Mini Nukes, the weapon will reload but never discharge the payload.

Durability
The Experimental MIRV can fire a total of 63 shots, the equivalent of 504 mini-nukes, from full condition before breaking.

Variants

 * Fat Man - The common variant in Fallout 3.

Location
It can be found in the armory bunker in the National Guard depot. The player must complete the unmarked quest Keller Family Refuge before they can gain access to the bunker housing the weapon.

Behind the scenes
MIRV is a military term for Multiple Independent Reentry Vehicle. It is a collection of nuclear weapons carried on a single intercontinental ballistic missile. Using a MIRV warhead, a single launched missile can strike several targets, or fewer targets redundantly.

Bugs

 * Sometimes a graphics error can occur when detonation is very close. It can cause large, black rectangles to extend from the weapon out to as far as you can see. A console restart will fix this.
 * Sometimes when lifting the item, it will twirl around in the air.
 * If you equip the weapon and enter V.A.T.S. while having less than 8 Mini nukes, V.A.T.S. will not show you the "not enough ammo" box. Attempting to use the weapon will cause you to not fire anything and get stuck in the V.A.T.S. sequence. Reloading a save will fix the problem.