"This weapon didn't gain popularity until it won the duel between Blood Eagle Nira Magnus and the Usurper. Magnus won by clubbing the Usurper in the face after she ran out of ammo." In-Game Description
The Holdout Shotgun deals more damage than the standard Shotgun, but at the expense of ammo. It fires 8 hitscan bullets that deal 85 damage at close range (total 680 if all hit). Like all shotguns this weapon is ineffective beyond close range due to damage falloff, although it seems to have a slightly better range than most other shotguns.