Speak to Fawkes when he is taking you to the G.E.C.K. Go in that room and then follow the small corridor and at the end it will be lying on a table. Take a sharp left in the open area, and then the first left on the same wall you came in from. Walk down the stairs and follow that corridor until you get into the big open area. Side with the AntAgonizer and give her the Mechanist's costume for the weapon.ДЇound in the Clifftop shacks inside the smaller of the two sheds, in the hand of a skeleton, under the bed.Д¬arried by Butch DeLoria during the Trouble on the Homefront quest.ДЇound in the engine room during the generator-destruction phase of the main quest. Received when you complete the mission The Superhuman Gambit. Obtained by turning in 30 steel ingots to Everett during the Mill Worker quest.ДЇound (complete with holotaped instructions) at the end of the Flooded Metro west of Arlington Library, opposite a large traffic pile-up. You must have the Lawbringer perk to get this item. Found next to a computer on a desk, in the upper area of the derelict power plant at MDPL-13 power station, northwest of Minefield.Д¬arried by Junders Plunkett, who is found at the Arlington House in the Arlington Cemetery.

Guns in fallout 3