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Grenade machinegun

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For an overview of grenade launcher models throughout the Fallout series, see Grenade launcher.
Grenade machinegun
Grenade machinegun icon.png
Regular and fully modified
SkillExplosives 100
Strength Req.8
Attack statistics
5 (6) + 50 (89.5) ExplosionIcon explosion.png
165 (544.1)
DPS (reload)
117.9 (346.5)
Crit Dmg
Crit % Mult
3 (5.7)AP50
Ammo & reloading
Ammo Type25mm grenade
Ammo Cap.30
Reload Time
4 (3)
Item HP400
Grenade machinegun
Grenade machine guns
Editor ID?
Base ID00090a6a
Perk Effects
Perks (dam.)
Demolition Expert
( +30 ExplosionIcon explosion.png)
Lord Death
(+0.2 +2 ExplosionIcon explosion.png)
Bloody Mess
(+0.3 +2.5 ExplosionIcon explosion.png)
Thought You Died
(+0.5 +5 ExplosionIcon explosion.png)
Perks (Att.)
Fast Shot
Heave Ho!
Perks (Rel.)

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


The grenade machinegun (GMG) is a recoil-operated, belt-fed, fully automatic 25mm grenade launcher. Belts are fed into the firing chamber from a magazine can on the bottom of the weapon. The can is offset to the left, to accommodate the electronic monitoring system mounted on the weapon (though after the Great War, no units have been identified as having a working system). The weapon is patterned exclusively towards right-handed operators.

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




Name Type Dmg/shot DPS Att/sec Crit mult Crit dmg Spread AP cost Ammo Ammo cap Weight Item HP Value Stat Req.
Grenade machine gun Grenade launcher 5 + 50 ExplosionIcon explosion.png 165 3 x0.28 0 1.0 50 25mm grenade 30 15 400 5200 Explosives:100 Strength:8
Mercy Grenade launcher 5 + 100 ExplosionIcon explosion.png 325.5 3.1 x13.44 0 1.0 50 40mm grenade 18 15 500 5200 Explosives:100 Strength:8



  • 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 computer 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 (essentially the UNIX equivalent to Windows batch scripts). The code itself wouldn't work as it contains syntax errors (No 'fi' ending the 'if' block.) When firing the text scrolls the same chunk of code.


  • PCIcon pc.png PlayStation 3Icon ps3.png Xbox 360Icon xbox360.png 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.
  • PCIcon pc.png PlayStation 3Icon ps3.png Xbox 360Icon xbox360.png 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.
  • Xbox 360Icon xbox360.png 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.



Grenade machinegun icon.png ReloadVB.png