Experimental MIRV

The experimental MIRV is a weapon in Fallout 3.

Characteristics
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.

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
The player must complete the unmarked quest Keller Family Refuge before they can gain access to the secure section of the depot housing the weapon, though it's also possible to gain entrance to the armory by using a glitch. See the National Guard depot bugs section for more details.

Also this item can be found when doing the side quest "Those!" given by Bryan Wilks wandering outside of Grayditch, and passing a speech check to obtain a "Dumpster key", proceed to the diner and go to the dumpster behind the building

Behind the scenes
MIRV is a military term for Multiple Independent Reentry Vehicle (or Multiple Independently Targetable Reentry Vehicle). It is a collection of nuclear weapons carried on a single intercontinental ballistic missile (ICBM). Using a MIRV warhead, a single launched missile can strike several targets, or fewer targets redundantly. The MIRV system was developed throughout the middle of the 20th Century, and one of the main ideas behind the weapon system was to take out an enemy country with a single missile attack before the enemy nation could be able to respond.

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, making it very hard to decorate your Megaton house or Tenpenny suite with it.
 * 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, but if you actually try to use it the weapon will not shoot and you will get stuck in the V.A.T.S. sequence, reloading a save will fix the problem.

Gallery
Eksperymentalny MIRV

Экспериментальный многозарядный ядерный гранатомёт Experimentelles MIRV