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Fallout Wiki

The 10mm submachine gun (SMG) is a small gun in Fallout 3.


10mm submachine gun expanded

With a fully automatic rate of fire and a 30-round magazine, the SMG is effective against wildlife and unarmored humans. 10mm ammo for the weapon is one of the most plentiful in the game and the SMG is also quite common, making it easy to repair. However, it suffers from poor accuracy due a high spread, making it ineffective at longer ranges.


The 10mm SMG can fire a total of about 1190 times, the equivalent of 40 reloads, from full condition before breaking.


  • Sydney's 10mm "Ultra" SMG - Relic hunter Sydney's weapon of choice, the Ultra SMG holds an astounding 50 10mm rounds in a single magazine, and deals more damage than the standard SMG.
  • Operation: Anchorage (add-on) Sim version - A sim-only version of the weapon which differs only in health, with a whopping 999,250 hit points, which essentially prevents the gun from ever degrading, well over 1500 rounds of ammunition can be fired without it degrading 1%. It can be obtained in the sim through certain equipment packs on the equipment terminal.
  • Cut content 10mm Alloy Steel Submachinegun - Another version of the weapon was cut from the Operation: Anchorage add-on. Called the 10mm Alloy Steel Submachinegun, it is otherwise identical to the standard 10mm SMG.


Weapon name (current weapon is highlighted)- Weapon name (melee or unarmed)Attacks in V.A.T.S.- Attacks in V.A.T.S.
Weapon name (current weapon is highlighted)- Weapon name (gun, energy or explosive)Action point cost- Action point cost
Damage per attack (damage per projectile)- Damage per attack (damage per projectile)Damage per action point- Damage per action point
Damage per second- Damage per secondWeapon spread- Weapon spread
Area of effect damage- Area of effect damageMagazine capacity (shots per reload)- Magazine capacity (shots per reload)
Effect damage & duration- Effect damage & durationDurability (number of attacks before breaking)- Durability (number of attacks before breaking)
Bonus effects- Bonus effectsWeight- Weight
Attacks per second- Attacks per secondValue in caps- Value in caps
Critical chance % multiplier- Critical chance % multiplierValue to weight ratio- Value to weight ratio
Critical damage- Critical damageSkill required- Skill required
Critical effect damage & duration- Critical effect damage & durationStrength required- Strength required
With all mods attached- With all mods attached
Weapon name (current weapon is highlighted)Damage per attack (damage per projectile)Damage per secondAttacks per secondCritical Chance % multiplierCritical damageAttacks in V.A.T.S.Action Point costDamage per action pointWeapon spreadMagazine capacity (shots per reload)Durability (number of attacks before breaking)WeightValue in capsValue to weight ratio
10mm submachine gun 7
Sydney's 10mm "Ultra" SMG 9