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The grenade machinegun is a weapon in Fallout: New Vegas.


The grenade machinegun is a powerful rapid-fire weapon which uses 25mm ammunition. The attached computer monitor appears to show the weapon's feed system and other details, although this is purely cosmetic and does not reflect actual use. While its contents are cosmetic, the monitor does appear to control the feed system as when the weapon jams the display distorts, and the Courier unjams it by hitting the monitor.

Outside of V.A.T.S., the weapon can be used for indirect fire over a considerable distance.


The grenade machinegun can fire a total of about 1995 standard rounds, the equivalent of 67 reloads, from full condition before breaking.

The grenade machinegun is considered a unique class of weapon and therefore cannot benefit from the Jury Rigging perk.




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 secondArea of effect damageAttacks per secondCritical Chance % multiplierCritical damageAction Point costDamage per action pointWeapon spreadMagazine capacity (shots per reload)Durability (number of attacks before breaking)WeightValue in capsValue to weight ratioSkill requiredStrength required
Grenade machinegun 0
Grenade machinegun With all weapon mods attached 0
Mercy 5



If the firing button is held as the weapon runs out of ammunition, the grenade machinegun will keep playing its firing animation, even though it is out of ammunition (no firing sound is played while this happens). The screen will also still keep scrolling as if firing.

Behind the scenes

The text on the screen of the gun is written in BASH script. The code would be used to check the number of parameters provided by the user, providing an error if the number was incorrect. However, it is incomplete, lacking a matching fi (end if) to the if statement. When firing, the text scrolls the same chunk of code.


  • PCPC Playstation 3Playstation 3 Xbox 360Xbox 360 Lonesome Road overrides some of the changes that have been made to the grenade machinegun in previous patches. With Lonesome Road installed and nothing else taking up space in your load order, the grenade's base damage is decreased to 0 and its item HP is reduced to 200. [verified]
  • PCPC Playstation 3Playstation 3 Xbox 360Xbox 360 Occasionally firing a multitude of rounds in quick succession will cause the sound to delay, hearing both the 'firing' and 'impact' sounds repeatedly trying to catch up, long after letting up on the trigger. If fired additional times when caught up in the delay, the hardware begins to lag as well, causing freezing and stuttering. This can often be fixed by firing one more time. [verified]
  • PCPC Playstation 3Playstation 3 Xbox 360Xbox 360 The ammunition pack may become stuck to the back of the player character. To fix this, drop the grenade machinegun, equip another weapon. Drop the second weapon before picking up both weapons. [verified]
    • Alternatively, if you hot-key the weapon and equip another weapon on another hot-key, it may work.
  • PCPC Xbox 360Xbox 360 The grenade machine gun doesn't inflict any damage on lakelurk kings at Blue Paradise Vacation Rentals. Lakelurk kings will die inside Camp Guardian caves. The coyote pup inside the truck trailer with at Canyon Wreckage will not die or take any damage, however the coyote den mother will. The coyote pack alpha on top of hill by the Canyon Wreckage can be killed with the grenade machinegun, but the other coyotes and pups will not take any damage with this weapon. The bark scorpion at the Ivanpah Dry Lake does not take any damage either. The Golden Gecko Hunter at the Crescent Canyon does not take any damage from the weapon but regular Golden Geckos do. Radscorpions just south of Black Rock Cave will not die or take any damage either from the grenade machinegun. [verified]


Grenade machinegun icon.png ReloadVB.png