First Known Use: 1968
Dictionary
M16
noun \ˌem-(ˌ)sik-ˈstēn\
Definition of M16
: a .223 caliber (5.56 millimeter) gas-operated magazine-fed rifle for semiautomatic or automatic operation used by United States troops since the mid 1960s
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Origin of M16
model 16
Rhymes with M16
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