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The Vault - Fallout Wiki
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For an overview of 5.56 rounds throughout the Fallout series, see 5.56 round.
5.56 round
Fo4 556mm.png
Editor IDAmmo556

5.56 round is a ballistic ammunition type in Fallout 76.


The following section is transcluded from 5.56mm round. To modify, please edit the source page.

The 5.56x45mm round is a rifle cartridge derived from the .223 Remington, originally developed for the M16 service rifle of the United States Army.[1][2] It is a rimless, bottleneck cartridge that offers tremendous wounding potential under the right condition. Its performance and popularity among military forces endures despite the Great War: By 2287, it has served Americans for over two centuries, from the United States Army to the New California Republic Army.


Weapons using this ammunition

Category 3 not found


Tinker's Workbench
20 5.56 Round

The above template is generated from Template:F76 co Tinkers Ammo 556. For corrections, edit the target template.



  1. Vault Dweller's Survival Guide p.5-17: "Rifle caliber ammunition. The FMJ stands for Full-Metal Jacket, which describes the bullet that is used in the round of ammo. A FMJ bullet is very tough, and has pretty good penetration without sacrificing good expansion. In other words, it‘s an average round."
  2. Fallout Official Survival Guide p.119: ".223 Full Metal Jacket (FMJ): This is the same ammo used in the late 20th century by various military rifles, including the M-16. A good, basic, hard-hitting round."