Yes it is, to say it isn’t is just a lie, even if only one due to being under informed. To put it like this, talking about big rigs, 18 wheelers, or whatever you would like to call them, here in the US you mainly see “long nose” (American) styles, although yes you do still see “flat nose” or “cab over” designs, they are the European style, as the roads in Europe tend to be smaller than here in American, mainly due to some of those roads being much older than the USA is.
that’s different, bank notes follow the same pattern/design, the components that could be printed for firearms vary so much in shape and size, even for the same components across different platforms.