To manufacture a qualified revolver in this era, there wasn't any technological bottleneck.
The fact that it hadn't been invented yet was probably just lacking a moment of epiphany from an Artisan.
Of course, if Byron were to suddenly die one day, his Spirituality falling into the collective subconscious of humanity, the knowledge in his head would likely cause a gluttonous frenzy of celebration for Artisans and Naturalists around the world.
