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M16步枪是在5.56mm口径AR15基础上发展而来的,AR15的前身则是诞生于1956年的7.62mm AR10步枪。半个多世纪以来,AR系步枪在军、警、民领域延伸发展,形成高度模块化的庞大武器家族,包括口径和外观,都可以根据需要而改变。AR系列可以采用的口径是一个相当庞大的数字,本文在此历数其所配用枪弹的种类,上篇先呈现的是以AR15为基型衍生出的不同口径枪弹——
The M16 rifle was developed on the basis of a 5.56mm caliber AR15, the predecessor of which was the 7.62mm AR10 rifle that was born in 1956. For more than half a century, AR-based rifles have been extended in the military, police and civilian sectors to form a highly modular and generous family of weapons, both caliber and look, that can be changed as needed. AR series can adopt the caliber is a very large number, this article in its calendar with the types of bullets, the first article is based on AR15-based derivative of different caliber bullets -