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For an overview of grenade launcher models in all games, see grenade launchers.

Mercy is a unique 40mm grenade machinegun in Fallout: New Vegas.


A veritable relic, Mercy is a pre-War US Army automatic grenade launcher that was apparently used by one of the US Army's counter-insurgency units hunting Chinese Hei-Gui commandos in the American southwest. Presumably 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 was killed while exploring Dead Wind Cavern.


Its higher damage comes at the cost of using 40mm grenades, which are less common and more expensive than the 25mm grenade used by standard grenade machineguns. The larger size of the 40mm grenades also restricts its ammunition capacity to 18 grenades, which is 12 fewer than the regular grenade machinegun. The 40mm grenade is also heavier than its 25mm counterpart, further limiting the amount of ammo the player can carry in hardcore mode without being over-encumbered. Like most unique weapons, Mercy cannot be modded. This weapon looks extremely rusted and heavily used.


Mercy can fire a total of about 2495 standard rounds, the equivalent of 139 reloads, from full condition before breaking.



Weapon name (current weapon is highlighted)Icon gunDamage per attack (damage per projectile)Icon damageDamage per secondIcon dpsArea of effect damageIcon explosionAttacks per secondIcon attackCritical Chance % multiplierIcon chanceCritical damageIcon critical damageAction Point costIcon actionDamage per action pointIcon dapWeapon spreadIcon spreadMagazine capacity (shots per reload)Assault carbine extended magazinesDurability (number of attacks before breaking)Icon repairWeightIcon weightValue in capsIcon merchantValue to weight ratioIcon ratioSkill requiredIcon abilityStrength requiredIcon fist
Grenade machinegun 0
Grenade machinegun With all weapon mods attachedIcon plus 0
Mercy 5


Behind the scenesEdit

  • 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 (OS X, BSD, FreeBSD, NeXTSTEP, Ubuntu etc.).


  • xbox360Icon xbox360 ps3Icon ps3 pcIcon pc The game may crash if you fire continuously in the same place. [verified]
  • xbox360Icon xbox360 The weapon can disappear from your game. [verified]


Grenade machinegun icon