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12.7mm submachine gun

FO76 publicteam xpd.pngFor an overview of the topic, see submachine gun.
For the Gun Runners' Arsenal version of this weapon, see 12.7mm submachine gun (GRA).

The 12.7mm submachine gun is a weapon in Fallout: New Vegas.


More common at higher levels, the 12.7mm submachine gun is a heavy-duty large-caliber submachine gun (SMG). It has a high damage-per-second but suffers from a small magazine capacity and a fairly large spread.

Unlike most other submachine guns, the 12.7mm submachine gun is classified as a two-handed weapon; because of this, traveling with the weapon unholstered will slow the player character's movement speed. This also causes the weapon to be holstered on the back, rather than on the hip as with most SMGs. This also affects it with regard to the Jury Rigging perk, putting it in the same repair class as the Service Rifle and light machine gun, instead of with one-handed automatics like the 10mm and 9mm SMGs.


The 12.7mm submachine gun can fire a total of about 2495 standard rounds, the equivalent of 119 reloads, from full condition before breaking.

Ammunition typeDurability
Standard, HP & JHP2495119




Weapon name (current weapon is highlighted) Weapon name (melee or unarmed) Weapon name (current weapon is highlighted) Weapon name (gun, energy or explosive)
Damage per attack (damage per projectile) Damage per attack (damage per projectile) Damage per second Damage per second
Area of effect damage Area of effect damage Effect damage & duration Effect damage & duration
Bonus effects Bonus effects Attacks per second Attacks per second
Critical chance % multiplier Critical chance % multiplier Critical damage Critical damage
Critical effect damage & duration Critical effect damage & duration With all mods attached With all mods attached
Attacks in V.A.T.S. Attacks in V.A.T.S. Action point cost Action point cost
Damage per action point Damage per action point Weapon spread Weapon spread
Magazine capacity (shots per reload) Magazine capacity (shots per reload) Durability (number of attacks before breaking) Durability (number of attacks before breaking)
Weight Weight Value in caps Value in caps
Value to weight ratio Value to weight ratio Skill required Skill required
Strength required Strength required
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 ratioSkill requiredStrength required
12.7mm submachine gun 36
12.7mm submachine gun Gun Runners' Arsenal36
12.7mm submachine gun With all weapon mods attached Gun Runners' Arsenal36



  • As this is an automatic weapon, its attack speed is not affected by perks that increase the Courier's attack speed, such as Ain't Like That Now.
  • The 12.7mm submachine gun is also one of only three fully automatic weapons which are capable of being silenced (the 12.7mm SMG Suppressor is not to be confused with the 12.7mm Submachine Gun Silencer, as they are not interchangeable), the others being the silenced .22 SMG and Sleepytyme from the add-on Gun Runners' Arsenal.
  • The weapon's rear sight is actually located on the magazine, an unusual feature.
  • The 12.7mm SMG is one of few weapons that have its own unique reload animation. No other gun has this reload animation and it has no unique counterpart.

Behind the scenes

When asked what the weapon was based on, Joshua Sawyer stated that the gun is "pretty much pure fiction, though a couple of elements were loosely inspired by the P90 and Kriss Vector."[Dev 1]


  • Playstation 3Playstation 3 Xbox 360Xbox 360 Although the weapon's value at 100% condition is 5089, it can be repaired up to 5096. [verified]
  • Xbox 360Xbox 360 Sometimes, when firing in first person view, the bullets won't appear but the ammo, but will be spent as normal.[verified]
  • PCPC After equipping the silencer, weapon may only do damage when using VATS mode. [verified]
  • Xbox 360Xbox 360 Sometimes when looting 12.7mm submachine guns they will be added into the inventory on top of one another[verified]





Developer Statements
  1. Question: "Yay for more Based on Z questions: Was the 12.7mm SMG based on any existing weapon or is it purely fictional?"
    Sawyer: "Pretty much pure fiction, though a couple of elements were loosely inspired by the P90 and Kriss Vector."
    JESawyer on Formspring (Archived)