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From The Vault - Fallout Wiki
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Icon disambig.svg
For an overview of grenade launcher models throughout the Fallout series, see Grenade launcher.
FNV Mercy.png
Grenade machinegun icon.png
SkillExplosives 100
Strength Req.8
Attack statistics
5 (6) + 100 (179) ExplosionIcon explosion.png
325.5 (1089.4)
DPS (reload)
192.7 (549.7)
Crit Dmg
Crit % Mult
3.1 (5.9)AP50
Ammo & reloading
Ammo Type40mm grenade
Ammo Cap.18
Reload Time
4 (3)
Item HP500
Grenade machinegun
Editor ID?
Base ID0015fff4
Perk Effects
Perks (dam.)
Demolition Expert
( +60 ExplosionIcon explosion.png)
Lord Death
(+0.2 +4 ExplosionIcon explosion.png)
Bloody Mess
(+0.3 +5 ExplosionIcon explosion.png)
Thought You Died
(+0.5 +10 ExplosionIcon explosion.png)
Perks (Att.)
Fast Shot
Heave Ho!
Perks (Rel.)

Mercy is a unique grenade machinegun in Fallout: New Vegas.


A veritable relic, Mercy is a pre-War US Army automatic grenade launcher that was used by one of the US Army's counter-insurgency units hunting Chinese Hei-Gui commandos in the American southwest. During this period, one of its operators spray-painted Hei Gui Bye Bye on the chassis. At an undetermined time, it was obtained by the Brotherhood of Steel and continued to serve as a weapon, eventually ending up in the hands of a Paladin in the Mojave chapter. It was lost when its operator fell while exploring Dead Wind cavern. It looks extremely rusted and used.

In function, Mercy is a recoil-operated, belt-fed, fully automatic 40mm grenade 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.


Its higher damage comes at the cost of using 40mm grenades, which are less common and more expensive than the 25mm grenades used by standard grenade machineguns. Despite the weapons extremely high critical hit multiplier, Mercy is incapable of dealing additional damage with critical hits, so the exceptional value is moot.

The larger size of the 40mm grenades also restricts its ammunition capacity to 18 grenades, which is 12 less than the regular Grenade machine gun. Like most unique weapons, Mercy cannot be modded. It can fire 2495 grenades from full condition before breaking.

The writing on the "display" is easily recognizable as part of a Bash script, a very common way of scripting out actions in the Linux and Unix world.



Name Type Dmg/shot DPS Att/sec Crit mult Crit dmg Spread AP cost Ammo Ammo cap Weight Item HP Value Stat Req.
Grenade machinegun 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



  • PlayStation 3Icon ps3.png The game may crash if you fire continuously in the same place.
  • Xbox 360Icon xbox360.png The weapon can disappear from your game.



Grenade machinegun icon.png ReloadVB.png