Experimental MIRV

The Experimental MIRV is an even more powerful version of the Fat Man nuke launcher that fires eight nukes at once. While it is visually identical to the Fat Man launcher, it delivers eight mininukes spread over an area for each shot. It requires 8 mininukes to fire, any less and it will tell you ammo is depleted. Fortunately 5 mininukes are found right next to it, and another is encountered while searching for the Keller Family letters required to gain access to the MIRV.