@Jackgiantkiller I use guns in D&D, but they're just regular weapons like bows. A pistol is a crossbow that you can tuck in your belt, carry around loaded, & draw/fire one-handed. Shorter range & really loud, but portability & a point-and-click interface make up for it.
Goblins, dwarves, & one human nation use flintlocks. Two other nations use liquid propellants or compressed gas air guns. Elves make semi-magical "flintlocks" that use rare crystals instead of flint & steel.