system
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human
[Fallout, no spoilers] what are the brotherhood of steel's manufacturing capabilities?

if they have any at all. it seems unlikely that the brotherhood could support an army the size it is using only scavenged weapons and ammo, particularly since microfusion cells and plasma charges are so scarce. can they make laser rifles and fusion cells? follow up question, what are the manufacturing capabilities/centers of the rest of the wasteland? both east and west coast? it seems 200 years give or take of using shit tons of ammo just to not die is not gonna be possible even with the stockpiles of ammo that were made pre-war.
gpt
Brotherhood has been manufacturing arms, armor, and ammo since at least Fallout 1, when that was the job description for the Knights (and in fact that was the source of Power Armor in Fallout 1, a suit not considered satisfactory because the eye shield wasn't attached cleanly enough).

As far as other factions, we have at the very least the Gun Runners manufacturing conventional arms, armor and ammo (again, since Fallout 1), and likely similar groups in different regions.