\ ˌem-(ˌ)sik-ˈstēn
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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
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“M16.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/M16. Accessed 16 May. 2021.
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Time Traveler for M16
The first known use of M16 was in 1968
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