The Vault - Fallout Wiki

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The Vault - Fallout Wiki
Icon disambig.svg
For an overview of submachine gun models in the Fallout series of games, see submachine gun.
10mm submachine gun
10mm SMG.pngDummyImage.png
10mm SMG with extended mag and recoil comp.png
10mm SMG icon.png
Regular and fully modified
SkillGuns 50
Strength Req.5
Attack statistics
19 (22.6)
171 (284.9)
DPS (reload)
95 (154.8)
Crit Dmg
Crit % Mult
9 (12.6)AP22
Ammo & reloading
Ammo Type10mm round
Ammo Cap.30
Reload Time
2.7 (2)
Item HP500
10mm submachine gun
One-handed guns
Editor ID?
Base ID00004321
Perk Effects
Perks (dam.)
Lord Death
Perks (Att.)
Fast Shot
Perks (Rel.)
Rapid Reload

The 10mm submachine gun (SMG) is a weapon in Fallout: New Vegas


The following section is transcluded from Submachine gun. To modify, please edit the source page.

Commonly considered to be one of the finest weapons in the world, the Heckler & Koch MP9 submachine gun fires the powerful 10mm ammunition. Although the single shot is comparable to the Colt 6520 or the N99 pistol, the MP9 truly shines in burst and fully automatic modes. Coupled with the compact design, sturdiness, and light weight, it becomes a powerful asset in the hands of anyone in the wasteland. Although, the high fire rate means the urge to spray-and-pray must be controlled, unless the operator wants to run out of ammunition. Thankfully, the ease of handling makes this easier than it seems.[1] An unique feature of the weapon is its two selectors: one for switching between safety, single shot mode, and automatic mode, and another for specifying the size of the burst, up to fully automatic fire.[2][3]


10mm SMG expanded

A powerful one handed automatic weapon, the MP9 boasts excellent damage per second against unarmored or lightly armored targets. However, as damage is calculated per bullet, it will offer sub-par performance against targets with a higher damage threshold. Additionally, the high weapon spread means that the player will have to fight on close ranges for all of the rounds to hit their intended target.

Its key flaw is its ammunition consumption: With a cyclic rate of over 600 RPM, it can go through a full 10mm magazine in under 3.5 seconds. It can fire a total of 2495 standard rounds, about 83 magazines, before breaking.

However, it will not slow the player down, as it is a one-handed weapon.



  • Gun Runners' ArsenalGametitle-FNV GRA.png Sleepytyme: A unique, heavily modified variant with a permanent suppressor and compensator mounted. Modified internal mechanics also give it better firepower and accuracy.


Name Type Dmg/shot DPS Att/sec Crit mult Crit dmg Spread AP cost Ammo Ammo cap Weight Item HP Value Stat Req. Notes
10mm submachine gun Submachine gun 19 171 9 x0.08 19 2.2 22 10mm round 30 5 500 2370 Guns:50 Strength:5 -
Sleepytyme Submachine gun 22 220 10 x0.1 22 1.7 22 10mm round 40 5 500 8250 Guns:50 Strength:5 Silenced


Non-player characters


  • Prior to patch, the 10mm SMG cost 20 AP to use in VATS, had a minimum spread of 4 degrees, and had an item HP of 250.



  1. Vault Dweller's Survival Guide p.5-16: "One of the finest weapons in the world. The H&K MP9 is a solid submachine gun, capable of single or burst mode attacks. The single shot is acceptable, comparable to the 6520 pistol, but the burst mode is spectacular! The MP9 is easy to control, and spews 10mm death like no other firearm in it’s size category."
  2. Appearance of the weapon in Fallout 3 and Fallout: New Vegas
  3. Models are presented together as per the precedent established by the CZ57 Avenger in Fallout: New Vegas; since the two submachine guns look very much alike, have the same niche, and perform the same function, they are most likely intended to be the same model.