The Vault - Fallout Wiki

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The Vault - Fallout Wiki
Icon disambig.svg
For an overview of 5mm round in the Fallout series of games, see 5mm round.
5mm round
5mm Round.png
5mm ammo icon.png
base id0006b53d
000615a8 (Fawkes' special version)

The 5mm round is a Big Guns-only ammunition in Fallout 3.


The following section is transcluded from 5mm round. To modify, please edit the source page.

A high velocity round designed for assault rifles, the intermediate 5mm M134 cartridge[1] has been replaced by the more powerful 5.56mm round in assault rifles.[2] However, it found a new life as linked, belt fed ammunition for man-portable miniguns on the battlefield, specifically the M134 cartridge and 7.62x51 millimeter rounds.[3] It has also been retained as the ammunition of choice for paratrooper assault carbines, due to its light weight and portability.[4]


The one and only ammunition type for the minigun, the 5mm round is designed for use in bulk. With 240 rounds per reload, the player is encouraged to use it in bulk against their targets.

The Gatling laser largely retires the 5mm as basic ammunition for Big Guns builds, though it may be useful in a backup capacity.

More notably, since ammunition is weightless, 5mm rounds can be used to create makeshift ladders through stacking their large containers.

Weapons using this ammunition


  • The PittGametitle-FO3 TP.png 5mm rounds are an excellent resource for crafting ammunition with the Ammo press.
  • Lucky Harith will stock them in bulk once the player completes investing in his business.
Non-player characters


  1. Ammunition package in Fallout 3 and Fallout: New Vegas states the following: "5mm LINKED M134
    1 TRACER M17 4 API M8
    FUNC LOT POD80h003L041"
  2. PRO ITEM.MSG: "{2300}{}{Assault Rifle}
    {2301}{}{An AK-112 5mm Assault Rifle. An old military model, out of use around the time of the war. Can fire single-shot or burst, using the high velocity 5mm rounds. Min ST: 5.}"
  3. Ammunition package in Fallout 4 and Fallout 76 states the following: "Cartridges
    "5"MM, Mil
    7.62 x 51 MM ACT
    (ST. A.CL.) 13S455
  4. Weapon appearance.