Gametitle-FNV OWB
Gametitle-FNV OWB

FIDO is the upgraded K9000 cyberdog gun in the Fallout: New Vegas add-on Old World Blues.


Unlike the K9000 cyberdog gun, FIDO uses .44 Magnum rounds instead of .357 Magnum rounds, resulting in higher damage and a slightly higher spread. The brain case and the scope are red instead of green and the decal is changed to a bulldog. Other features of the K9000 cyberdog gun are included in FIDO.


FIDO can fire a total of about 2,495 standard rounds, the equivalent of 50 reloads, from full condition before breaking.

Ammunition typeDurability
Standard, HP & SWC249550
.44 special332967



Icon melee- Weapon name (melee or unarmed)Icon sequence- Attacks in V.A.T.S.
Icon gun- Weapon name (gun, energy or explosive)Icon action- Action point cost
Icon damage- Damage per attack (damage per projectile)Icon dap- Damage per action point
Icon dps- Damage per secondIcon spread- Weapon spread
Icon explosion- Area of effect damageAssault carbine extended magazines- Magazine capacity (shots per reload)
Icon effect- Effect damage & durationIcon repair- Durability (number of attacks before breaking)
Icon bonus effect- Bonus effectsIcon weight- Weight
Icon attack- Attacks per secondIcon merchant- Value in caps
Icon chance- Critical chance % multiplierIcon ratio- Value to weight ratio
Icon critical damage- Critical damageIcon ability- Skill required
Icon crit effect- Critical effect damage & durationIcon fist- Strength required
Icon plus- With all mods attached
Icon gunIcon damageIcon dpsIcon attackIcon chanceIcon critical damageIcon sequenceIcon actionIcon dapIcon spreadAssault carbine extended magazinesIcon repairIcon weightIcon merchantIcon ratioIcon abilityIcon fist
K9000 cyberdog gun 26
K9000 cyberdog gun Icon plus 28


The schematics for FIDO are located in X-8 research center, next to the terminal in the kennels, which can be accessed after acquiring the key. The key can be found in a security room off of the front lobby of the X-13 research facility. After acquiring the schematics, taking the K9000 cyberdog gun to any workbench will allow it to be upgraded into FIDO. The process requires a Guns skill of 75.


  • FIDO is the only automatic weapon to use .44 Magnum rounds.
  • The upgrade is best applied to a K9000 cyberdog gun without mods, as applying the update will eliminate all mods the gun currently has.
  • Regardless of the K9000 condition, FIDO will be at 80% durability.
  • K9000's mods cannot be equipped to FIDO.
  • As a maximum of two K9000s can be obtained, one can therefore obtain two FIDOs.

Behind the scenesEdit

The name FIDO refers to the name of a famous dog, the name of which subsequently became archetypical, meaning "faithful," from the Latin fidus.


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