Big Boomer

The  is a unique weapon in Fallout: New Vegas. It is a unique variant of the sawed-off shotgun.

Characteristics
Similar to the double-barreled shotgun from Point Lookout, It fires two shells with one pull of the trigger, consuming ammo twice as fast, but dealing significantly better damage in the process. The gun has its name written on the side of it and is darker in color than the normal version.

Variants

 * Sawed-off shotgun

Location

 * The Big Boomer is carried by Old Lady Gibson, who resides in the Gibson Scrapyard. The weapon can be looted from her body, or shot out of her hands in combat (she'll become non-hostile if you quickly holster your weapon afterward).
 * It can also be obtained by first pickpocketing the 12 gauge shotgun shells off of Old Lady Gibson, initiating combat with her, holstering your weapon, then after several attempts, it is possible to take it off of her.

Bugs

 * When in first person mode, the weapon looks perfectly fine, but when in third person mode, the grip of the gun can be detached from the two barrels.
 * When entering the exterior area of Helios One, sometimes Old Lady Gibson (and all of her dogs) will teleport to the front of the door, greatly reducing the frame rate. A mole rat might also teleport, and kill her, giving you the weapon with no loss of karma or hostility from her dogs.(Confirmed)