5.56x45mm NATO

The 5.56x45mm NATO (also known as: 5.56) is an American centerfire cartridge originally found in the M16-rifle. It is very similar to .223 Remington but there are some small differences that must be noted. This is a NATO-round, meaning it is a standard cartridge for NATO counties. Like the .23 Remington, it is also used for target shooting and shooting. Being a military round, it's bullets generally are not designed for hunting for the most part, but it is also used for that.

Firearms
Below is a list of firearms chambered in .223 Remington. It is by no means complete and there is always more to be added.
 * AR15