The US Army's present intention to replace its entire family of 5.56 mm weapons with new equipment provides a rare opportunity to reconsider that choice.

美国陆军用新准备取代其整个5.56毫米武器的意图为重新思考这一选择提供了一个珍贵的机会。

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MM: What's wrong with us?

我们之间怎么了？

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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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Oil imported for export purposes: in 2011, the US exported 0.5 mm bpd in refined petroleum products.

FORBES: The Most Important Energy Developments Of 2012

After some adjustments (and I may be underestimating some of them), US net imports could fall to 4-5 mm bpd, a level which can be met by imports from countries with historically reliable economic and political linkages to the US (everything is relative).

FORBES: The Most Important Energy Developments Of 2012