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For the original version, see Double-barreled shotgun.

Quad-barreled shotgun or simply Quad Barrel is a Unique grade shotgun in Counter-Strike Online.


The Quad Barrel can only be obtained randomly by Hero/Heroine. It is an upgraded version of the Double-barreled shotgun and is able to fire four shells, either one at a time or all four at once.

This weapon is one out of the four exclusive weapons that can be chosen by the Hero/Heroine in Zombie 3: Hero. Moreover, it cannot be dropped by the player nor Deimos' shock ability.


  • Very high damage
  • Very high knockback power
  • High rate of fire
  • Light weight
  • High reserve ammo
  • Able to perform 4-round burst
  • More accurate when using the secondary fire mode


  • Small magazine capacity
  • Long reload time
  • Cannot shoot while reloading
  • Usable by Hero/Heroine only
  • Easily runs dry
  • Moderate against Heavy zombie



Zombie File:


  • The performance of this weapon is very poor in the ducts due to its shotgun shells that are unable to penetrate more than one zombie.
  • Shoot zombies on incline planes or while they are airborne to knock them far away.
  • Prioritize on targeting the Light zombie because it has low knockback resistance.
  • Shoot zombies with the secondary fire of this gun to knock them far away.

Comparison to Double Barrel[]

Dbarrel gfx


  • Higher clip size (+2)
  • Able to perform 4-round burst


  • Same damage, recoil, fire rate and weight
  • Shares the same ammo


  • Cannot be purchased other than becoming the Hero/Heroine
  • Longer reload time


Firing sound

Reload sound

Draw sound


  • Quad-barreled shotguns do exist in real-life, such as the Winchester Liberator. It was a simple shotgun designed for civilians and militias in the Vietnam War era.
  • Before the Zombie Mode Rework patch, this weapon was exclusive for Heroine only.
  • Even though Quad Barrel is exclusive to the Hero/Heroine, in Zombie File, there is a cutscene which shows David Black saving Soy with this gun at the end of the Third Report.
  • Like the Triple Barrel, the Quad Barrel's reload animation takes longer than the actual reloading time.