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Greased Lightning is an unarmed weapon added with the Fallout: New Vegas add-on Gun Runners' Arsenal.


Greased Lightning is a power fist variant with an extra hydraulic shock. It is powered by a nuclear battery, using the emissions from a radioactive isotope to generate electricity that greatly enhances the execution speed of its mechanism.

It appears to have a nickel black metal plating with a radiation symbol painted on the top, and three light copper colored pistons. On the fist's right side, there is a "Radiation risk" warning sign. On the left side, there are 33 tally marks.


Greased Lightning has a lower damage (DAM) value than most higher-leveled Unarmed weapons in the game. Despite this, its extremely high attack speed gives it a higher damage per-second (DPS) than most, making up for the lack of damage output. Greased Lightning is also an improved holdout weapon, so it may be snuck into casinos. It cannot accept weapon modifications like the normal GRA variant.

V.A.T.S. Special Attacks

Type of attackSkill requiredDamage per attack in V.A.T.S.Action point costDamage per action pointAdditional effects
Stomp50128206.4Only on knocked down enemies
Cross7570.4203.522.5x damage to limbs
Note: Unarmed weapons do double normal damage in V.A.T.S.


Greased Lightning can successfully strike about 995 times from full condition before breaking.



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 secondEffect damage and durationBonus effectsAttacks per secondCritical Chance % multiplierCritical damageCritical effect damage and durationAction Point costDamage per action pointDurability (number of attacks before breaking)WeightValue in capsValue to weight ratioSkill requiredStrength required
Power fist 40
Power fist Gun Runners' Arsenal40
Power fist With all weapon mods attached Gun Runners' Arsenal48
Greased Lightning Gun Runners' Arsenal32
Industrial hand Lonesome Road (add-on)50
160Ignores DR/DT3.2x140651.57995102500250757
Salt-Upon-Wounds' power fist Honest Hearts45
Saturnite fist Old World Blues (add-on)35
Saturnite fist super-heated Old World Blues (add-on)55
Note: Unarmed damage is doubled in V.A.T.S.



  • Special unarmed attacks can be performed at extremely fast speeds with this weapon.
  • Due to the weapon's high attack speed and low damage, its condition decays rapidly.
  • Targets can fly into the air or skid across the ground when killed with the fist.
  • If the Brotherhood of Steel is hostile towards the player, Greased Lightning may be impossible to obtain. This is because Torres is set to respawn every three days. (See Torres' bug section)
  • Even if Torres is dead, the Gun Runners may not sell the power fist. This may be fixed by uninstalling, then reinstalling the add-on.

Behind the scenes

"Faster than greased lightning" is an American idiom. The phrase was popular in the 50s and 60s, and refers to the weapon's high attack speed.


Power fist icon.png