M16
[ ˌem-(ˌ)sik-ˈstēn]
[ˌem-(ˌ)sik-ˈstēn]
: 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
Dictionary Entries near M16