556 Ammo rounds were only used by the M4 and the Bolt Action Rifle.
It could be found in Wooden storage crates, Green storage crates and Blue storage crates.
It could also be crafted assuming the player had correct material to do so. It's crafting recipe was NOT known by default, and could only be researched using a Research Kit.
Crafting[]
A 556 round could be crafted with:
It took 0.3 seconds to craft a single bullet.
Trivia[]
- The 556's full name is the 5.56x45mm NATO.[1]
References[]