When did countries decided to regularly produce and arm their respective armies?
Like when did they decide to make patterns of the same guns?
I'm genuinely curious.
Interestingly there is very little info of the standardisation of guns online, for some reason.
It's not exactly what you're asking for, but I touch on some of this in an old answer about nationalized firearm manufactories. I'm happy to answer followups here if you have any.