One of the early combination self-defense guns was the "Sure Defender", with a combination of brass knuckles, a small and finicky wavy-bladed dagger, and a single shot percussion pistol barrel. The rather complex process for making the knife or pistol components ready to actually use suggest that this may not have been the most practical tool...but the tacti-cool has always been popular, whether in the 1860s or in the present day.