+**556** commonly refers to the 5.56×45mm NATO, a standard [Ammunition](/wiki/Ammunition) cartridge. It is widely adopted by military forces worldwide for various [Rifles](/wiki/Rifle), known for its versatility and performance.
+## See also
+- [Firearm](/wiki/Firearm)
+- [Bullet](/wiki/Bullet)
+- [Caliber](/wiki/Caliber)
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