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5mm round (Fallout 76)

FO76 publicteam xpd.pngFor an overview of the topic, see 5mm round.

5mm rounds are a type of ammunition in Fallout 76.


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A high velocity round designed for assault rifles, the intermediate 5mm M134 cartridge[1] has been replaced by the more powerful 5.56mm round in assault rifles.[2] However, it found a new life as linked, belt fed ammunition for man-portable miniguns on the battlefield,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 is stored in downscaled ammo boxes designed for the 7.62x51mm NATO cartridge in Fallout 4 and Fallout 76.[3]


The 5mm round is a small caliber rifle cartridge produced for use by the military, these rounds came in 200 cartridge army green ammo boxes. 5mm rounds were used rather exclusively by the military with their minigun, though Gatling guns can be found in Appalachia modified to fire the modern cartridge.


Standard 5mm rounds
Lead (15)
Steel (30)
Build at:
Learn Method:
Known by default
Ammosmith (optional)
Ammo Factory (optional)
5mm round (100)
Ultracite 5mm rounds
Lead (22)
Steel (45)
Build at:
Learn Method:
Ammosmith (optional)
Ammo Factory (optional)
Ultracite 5mm round (200)

Weapons using this ammunition



  • With the Bandolier perk, the weight of the ammunition decreases drastically.
  • With the Ammosmith perk or Ammo Factory legendary perk, the crafted amount of rounds increase incrementally, coinciding with the perk's added percentages, crafting more rounds for the same amount of materials.
  • With the Super Duper perk, the chance of crafting twice the amount increases by 10% per rank, up to 30%.



  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