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M16

or M-16

[ em-siks-teen ]

Trademark.
  1. a lightweight, gas-operated, magazine-fed assault rifle with a caliber of .223 inches, used for fully automatic or semiautomatic fire: a U.S. Army combat weapon for mobile units since 1963. Compare AK-47 ( def ), AR-15 ( def ).


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Word History and Origins

Origin of M161

First recorded in 1965–70

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