[Spoilers C1] How did Orthax know about guns?

So I've been doing a rewatch of the series lately, and I found myself asking, how did Orthax somehow know about guns, enough to teach Percy how to make them?

Crossbows already existed in Tal'Dorei, and those were actually the first ""great equalizer"" weapons before guns were conceptualized. Also, in the Abyss we also obviously don't see the usage of a lot of manufactured weaponry eithers, demons being who they are.

Ironically it seems to me that Orthax may singlehandedly have kickstarted what could be the beginning of Tal'Dorei's industrial revolution.

Anybody want to discuss this further with me?