5.56mm round

The 5.56mm Round is a small guns ammunition found in the game. It is used with the Assault Rifle, the Chinese Assault Rifle and their unique variants.

Fallout 3 Weapons Using 5.56mm Round Ammunition

 * Assault Rifle
 * Chinese Assault Rifle
 * Xuanlong Assault Rifle

Description
Generally speaking, the 5.56mm Round is the third most common small guns ammunition found in the game, behind .32 Caliber Round and .10mm Round. After Picking up the Trail it becomes much more available as enemies start carrying Assault Rifles in place of Hunting Rifles.