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 cannot be reverse-pickpocketed from her. Even though a fully-repaired hunting shotgun is enough to get her to move Big Boomer into her unequipped inventory, she will catch your attempt to take the Big Boomer 100% of the time, even with 100 sneak skill, Chinese Stealth Armor and a Stealth Boy activated.

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)