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5.56mm Ammunition

Also known as: 5.56, 5.56x45, 5.56x45mm, 5.56 mm NATO, 5.56mm NATO, 5.56 NATO, 5.56 mm NATO, 5.56 mm NATO, 5.56x45mm NATO, 5.56x45mm NAT, 5.56 mm, 223 Caliber / 5.56mm, .556, 5.56mm "Factory Seconds", 556, 5.56 x45mm

The 5.56x55mm NATO was developed in the United States for use in the M16 rifle. It is a standard issue cartridge for NATO officers and is similar to the .223 Remington. During the Gulf War, there were repeated complaints that the 5.56 mm offered subpar performance on the first-shot kill rate. While it doesn’t have the best stopping power, it is still highly damaging because of post impact damage to soft tissue. Experts say that shot placement is the deciding factor on whether the 5.56c55mm will be lethal on the first shot.

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