Hello, I'm an expert in military and firearms history. Let's delve into the specifics of the NATO round.

The NATO round generally refers to a standard caliber of ammunition that has been adopted by the North Atlantic Treaty Organization (NATO) for use by its member countries. The term can apply to various types of ammunition, but it is most commonly associated with the 7.62×51mm NATO and the 5.56×45mm NATO cartridges.

The 7.62×51mm NATO round was introduced in the 1950s as a standard for battle rifles and is still in use today. It is known for its long-range performance and is used in various rifles, including the M14 and the FN FAL.

The 5.56×45mm NATO round, on the other hand, was adopted in the 1960s as a standard for assault rifles. It is lighter and has a faster velocity than the 7.62mm round, which makes it more suitable for fully automatic fire. This caliber is used in popular rifles such as the M16 and the M4.

Both rounds are designed to ensure compatibility and standardization across NATO forces, allowing for a streamlined supply chain and interoperability among member nations' armed forces.

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The 5.56��45mm NATO (official NATO nomenclature 5.56 NATO) is a rimless bottlenecked intermediate cartridge family developed in Belgium by FN Herstal. It consists of the SS109, SS110, and SS111 cartridges. Under STANAG 4172, it is a standard cartridge for NATO forces as well as many non-NATO countries.read more >>