Why did the Soviet Union think a lightweight, automatic rifle was needed?
为什么苏联认为一件轻型的、半自动的武器是人们需要的？
The XM29 was intended to be a shoulder-fired, semi-automatic grenade launcher in 20 mm calibre and to incorporate a compact, lightweight 5.56 mm rifle as a back-up weapon.
XM 29确定为一种抵肩射击，20毫米口径单发自动榴弹发射器并结合一个紧凑型，重量轻的5.56毫米步木仓做为后备武器。
The US Army uses two distinct families of weapons in 5.56 x 45 mm calibre: the M16 rifle and the derivative M4 carbine form one group, the M249 Squad Automatic Weapon the other.
美国陆军使用两种截然不同的5.56毫米口径木仓族：一种是M16步木仓以及其派生出来的M4卡宾木仓，另一种是M249班用机木仓。
The US Army uses two distinct families of weapons in 5.56 x 45 mm calibre: the M16 rifle and the derivative M4 carbine form one group, the M249 Squad Automatic Weapon the other.
美国陆军使用两种截然不同的5.56毫米口径木仓族：一种是M16步木仓以及其派生出来的M4卡宾木仓，另一种是M249班用机木仓。
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