From The New York Times:
In a pair of posts late last year (Part 1, Part 2), this blog covered several arguments surrounding the American military’s primary rifles, the M-16 and M-4, which are also widely used by police departments, counterterrorism units and other federal agencies. (Among those using M-4 rifles are the C.I.A., the State Department and the New York Police Department.)
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My Comment: A worthwhile post to read, and some good photos.