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Are you MAD?! We can't give it a GUN! GUNS... wait, I said that already. Yes, I have THE Cyberdog Gun. With the little floppy metal ears and the curious nose sensor. Here.Dr. Borous

The K9000 cyberdog gun is a weapon in the Fallout: New Vegas add-on Old World Blues.


The K9000 cyberdog gun was designed by researchers at the X-8 research center, although only two prototypes of the weapon were ultimately made. Following an incident in the X-12 research center involving Mr. Harris' death in a Y-17 trauma override harness, testing supervisor Dr. Adam Figgis gave away one copy of the gun to aid the response team, but they dropped it when confronted by the harness and were forced to leave it behind, where it fell into the harness' possession for the following centuries.[1][2]

Personnel at the X-13 research facility were also given details about the weapon and attempted to help researchers at X-8 by creating modifications and upgrades for the weapon.[3][4]


This weapon is actually an odd form of cyberdog, except instead of a robotic body in the image of a canine companion, a dog's brain in bio med gel has been provided with a machine gun frame, utilizing .357 Magnum ammunition. Its "canine" features include two metallic "ears" mounted on top of the weapon that move like a real dog's and a sniffer mounted on the jar containing its preserved brain, allowing the gun to sense its surroundings. The metal ears also appear to move up and down faster if the gun is pointing in the direction of an enemy.

It will growl when the player has it equipped and comes into contact with enemies, whine mournfully when unequipped and bark when equipped. It also has, atypically for a machine gun, a telescopic sight (x2.43 magnification) which gives a relatively accurate aiming point and excellent precision in firing for a chain gun type weapon. When fired, the barrels reciprocate, rather than spinning like those of the minigun.

The K9000 can also detect enemies out of visual and Perception range. When the weapon and its sniffer hover in the direction of an enemy for a few seconds, it will let out a detection growl, even at extreme range or when the enemy is hidden from appearing on radar.


The K9000 cyberdog gun can fire a total of about 2495 standard rounds, the equivalent of 50 reloads, from full condition before breaking.

Ammunition typeDurability
Standard, HP & JFP249550
.38 special332967



  • FIDO - A less accurate and more powerful version of the K9000, chambered in .44 Magnum ammunition. It is obtained when converting a K9000 after learning FIDO's schematic.


Weapon name (current weapon is highlighted)- Weapon name (melee or unarmed)Attacks in V.A.T.S.- Attacks in V.A.T.S.
Weapon name (current weapon is highlighted)- Weapon name (gun, energy or explosive)Action point cost- Action point cost
Damage per attack (damage per projectile)- Damage per attack (damage per projectile)Damage per action point- Damage per action point
Damage per second- Damage per secondWeapon spread- Weapon spread
Area of effect damage- Area of effect damageMagazine capacity (shots per reload)- Magazine capacity (shots per reload)
Effect damage & duration- Effect damage & durationDurability (number of attacks before breaking)- Durability (number of attacks before breaking)
Bonus effects- Bonus effectsWeight- Weight
Attacks per second- Attacks per secondValue in caps- Value in caps
Critical chance % multiplier- Critical chance % multiplierValue to weight ratio- Value to weight ratio
Critical damage- Critical damageSkill required- Skill required
Critical effect damage & duration- Critical effect damage & durationStrength required- Strength required
With all mods attached- With all mods attached
Weapon name (current weapon is highlighted)Damage per attack (damage per projectile)Damage per secondAttacks per secondCritical Chance % multiplierCritical damageAttacks in V.A.T.S.Action Point costDamage per action pointWeapon spreadMagazine capacity (shots per reload)Durability (number of attacks before breaking)WeightValue in capsValue to weight ratioSkill requiredStrength required
K9000 cyberdog gun 26
K9000 cyberdog gun With all weapon mods attached 28



  • The K9000 cyberdog gun causes certain distress in Dr. Klein, as he is afraid that the gun may attempt to "hump his chassis".
  • It is one of the rarest non-unique weapons in the game, with a total of two being obtainable.
  • When received from the Think Tank after passing the Guns check of 50, if the Courier has a Guns skill of 75 or higher, they will also be given some .357 Magnum rounds with it.
  • The K9000 cyberdog gun is the only fully automatic weapon in Fallout: New Vegas that uses .357 Magnum rounds.
  • Despite being chambered in Magnum rounds, the weapon ejects bottlenecked rifle casings when fired.
  • The popping and gurgling of the bio fluid in the gun can be heard even when the game is paused.

Behind the scenes

K9 is a homophone for "canine," another word for dogs. This abbreviation is often used as a designation for police and military units specialized in using dogs.


  • PCPC Playstation 3Playstation 3 Xbox 360Xbox 360 When using a Stealth Boy with the K-9000 cyberdog gun equipped, the brain case turns yellow. [verified]
  • PCPC Playstation 3Playstation 3 Xbox 360Xbox 360 There is a bug in the V.A.T.S. animation whereby it shows the weapon ejecting 12 spent cartridge cases instead of the correct number of 3. A close inspection of the damage dealt during one V.A.T.S. round will show that the weapon will deal the correct damage of 3 rounds and 3 rounds will be properly deducted from your inventory. [verified]
  • PCPC Xbox 360Xbox 360 There is a bug that sometimes occurs after wearing it, the ammo pack will be stuck on your back. This can be fixed by restarting the game. [verified]