M16

noun
\ ˌem-(ˌ)sik-ˈstēn How to pronounce M16 (audio) \

Definition of M16

: 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

First Known Use of M16

1968, in the meaning defined above

History and Etymology for M16

model 16

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Cite this Entry

“M16.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/M16. Accessed 10 Jul. 2020.

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