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For an overview of submachine gun models in the Fallout series of games, see submachine gun.

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


10mm SMG blown up

10mm submachine gun expanded

The 10mm submachine gun is a one-handed automatic weapon. Although the in-game description for the 10mm SMG lists a high damage-per-second (DPS), it shares the common weakness of most shotguns and automatic weapons in Fallout: New Vegas in that much of its theoretical power is negated by the damage threshold system. In addition to losing much of its damage, the high spread of this weapon requires the wielder to be at close ranges for all of the rounds fired to impact on the target.

Another downfall of the SMG is its ammunition consumption, as this SMG can eat through 10mm rounds at alarming speeds: emptying its magazine in 3 1/3 seconds. However, with full automatic fire and a 30-round magazine, the SMG is a decent side arm for close quarters combat.


The 10mm submachine gun can fire a total of about 2495 standard rounds, the equivalent of 84 reloads, or 63 reloads when modified with extended magazines, from full condition before breaking.

Ammunition typeUnmodifiedW/ Extended mags
Standard, HP & JHP249584249563



  • Sleepytyme Gametitle-FNV GRA - added in the add-on Gun Runners' Arsenal. It has a suppressor/compensator along with internal modifications that boost the damage and slightly elevate the rate of fire. It also comes with a darker finish and a larger magazine.


Icon melee- Weapon name (melee or unarmed)Icon sequence- Attacks in V.A.T.S.
Icon gun- Weapon name (gun, energy or explosive)Icon action- Action point cost
Icon damage- Damage per attack (damage per projectile)Icon dap- Damage per action point
Icon dps- Damage per secondIcon spread- Weapon spread
Icon explosion- Area of effect damageAssault carbine extended magazines- Magazine capacity (shots per reload)
Icon effect- Effect damage & durationIcon repair- Durability (number of attacks before breaking)
Icon bonus effect- Bonus effectsIcon weight- Weight
Icon attack- Attacks per secondIcon merchant- Value in caps
Icon chance- Critical chance % multiplierIcon ratio- Value to weight ratio
Icon critical damage- Critical damageIcon ability- Skill required
Icon crit effect- Critical effect damage & durationIcon fist- Strength required
Icon plus- With all mods attached
Icon gunIcon damageIcon dpsIcon attackIcon chanceIcon critical damageIcon sequenceIcon actionIcon dapIcon spreadAssault carbine extended magazinesIcon repairIcon weightIcon merchantIcon ratioIcon abilityIcon fist
10mm submachine gun 19
10mm submachine gun Icon plus 19
Sleepytyme Gametitle-FNV GRA22



  • Along with the 9mm submachine gun, the 10mm SMG will not slow one down when equipped.
  • Aiming can be difficult, due to the extremely thin circular iron sight and the distance between the rear sight of the gun.

Behind the scenesEdit

Was it a deliberate decision to make 10mm weapons very common in vaults and 9mm weapons common outside of them? It felt like 10mm weapons were more military or vault-tec issue while 9mm were civilian.
Joshua Sawyer: Yes. 10mm weapons seemed more "vaulty"/futuristic in my mind.
Joshua Sawyer


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