Gametitle-FNV OWB
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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 Gametitle-FNV OWB26
K9000 cyberdog gun Icon plus Gametitle-FNV OWB28
FIDO Gametitle-FNV OWB36


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, take a K9000 cyberdog gun to any workbench to upgrade it 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.

Behind the scenesEdit

The name FIDO refers to the archetypical dog name "Fido," which means "I am faithful."


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