M16

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noun \ˌem-(ˌ)sik-ˈstēn\

Definition of M16

  1. :  a .223 caliber (5.56 millimeter) gas-operated magazine-fed rifle for semiautomatic or automatic operation used by U.S. troops since the mid 1960s

Origin and Etymology of m16

model 16


First Known Use: 1968

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