Comments by "Crazy Eyes" (@CrizzyEyes) on "Walther MPL Submachine Gun" video.
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Germans are straightforward and like to use German words that describe the role/function of the weapon in their model designations. The Americans seem to typically prefer designing company names (AR-15 = Armalite model 15, NOT "assault rifle" as some morons would have you believe. similarly, the Springfield M1903 rifle was designed and manufactured by Springfield Armory). The American military also has a separate military classification for equipment that always just uses "M" followed by a number, which used to be the year of adoption but now is arbitrarily just whatever, for everything from pistols to tanks. Speaking as another American, I don't really get that, and I can tell you there isn't really much rhyme or reason to it.
The Brits used to be wonky though. For example, STEN is an amalgamation of the designers' names, Shepard and Turpin, as well as the manufacturing plant, the Royal Small Arms Factory in Enfield. More recently, it seems that UK equipment has more straightforward naming conventions (i.e. SA80 for Small Arm, 1980s)
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