Mercy

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

Characteristics
Its higher damage comes at the cost of using 40mm grenades, which are less common and more expensive than 25mm grenades. It cannot be modded, and fires much more slowly than a modded grenade machine gun. The larger size of the 40mm grenades also restricts its ammo capacity, which is 12 lower than the regular machinegun.

Location

 * Dead Wind Cavern - By a dead Brotherhood of Steel soldier, guarded by many Young Deathclaws, Deathclaws, and the Legendary Deathclaw.

Appearances
only appears in Fallout: New Vegas.

Behind the scenes

 * The weapon is in a similar location to the Fallout 3 weapon Vengeance. Vengeance is hidden in the Deathclaw Sanctuary, which has a similar concentration of deathclaws. Comparisons can also be drawn between the names of the two weapons.
 * The words "HEI GUI BYE-BYE" on the left side of the gun suggest that this gun may have been used to hunt the Chinese in the Hei Gui stealth suits during the war. This might explain the large amount of rust from use or age.

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