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What is 5.56x45mm NATO?One of NATO's military firearm calibers. The 5.56x45mm NATO catridge is used pretty much only for allied (America, UK, France, Germany, etc) assault rifles. The civilian 5.56x45mm NATO round is the .223 Remington. 5.56x45mm NATO - video5.56x45mm NATO - what is it?The 5.56x45mm NATO round is a micro-caliber rifle round based upon the .223 Remington loading. In the US military, it is known as the M855A1 in it's most recent incarnation. In the rest of the world the 5.56x45mm NATO is known as the SS109. The 5.56x45mm NATO round, also called the SS109, is the most commonly used Military-issue rifle round in the western world. However, it's usefulness has deteriorated against an enemy that does not value their lives, nor the lives of their comrades. |
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