To be honest, we didn't exactly want guns involved at all. But... flintlocks are kind of cool and it made sense to have them around, but still pretty rare. So we decided to be lenient about it and allow things like flintlock pistols and all.

Flintlock rifles do exist, but they're uncommon. And blending magic and technology, um... happens with some of the more expensive airships. They use steampunky stuff augmented with magic. It wouldn't do anything bad, except possibly make things require a bit more varied upkeep, since you'd need people good with technology and magic to keep them working properly.

And.. .honestly, the whole backstory reads much more like something WWI-based then something like this.