Uhhhh........ MUST REPRESS SARCASTIC HISTORY NERD!!!

Ehm.

1800s? That means rifles, ram loaded rifles granted, but rifles no less 1840s saw the advent of repeater rifles, the stuff cavalrymen favored in the eventual American Civi- NO! BAD HISTORY NERD

Ehm ehm.

What I'm trying to get around to is that I forgot to give better details. The weapon is based off of early "Revolver" rifle, which was, to put it officially, a very shitty system. I sort of put a magical spin on it, to where this is a weapon you essentially sell your soul to and feeds off your energy. I didn't mean the picture to convey what I had in mind, but like I said earlier, I forgot to give important details, my bad. Ultimately it is a lass ditch, desperation weapon that helped save nation. 

Oh wait! Idea just slapped in the face! What if that not only does this steampunky revolver rifle have its commitment problems, but also slowly causes the user to become more darker and sinister, as a unnoticed result of trying to combine magic with machine? Thus explaining the cruel brutality of the Arcis Foreign Legionaries and gradual degrade of Alika's mental state not only from the horrors of war, but the weapon itself! 

I don't know.... that's the best I can think of. If it's not sufficient, I am, of course, willing to do some serious edits to the CS. Sorry that I thought you meant the entirety of the 1800s. Cause things get really interesting in terms of war tech when you get in the late 1800s NO GO AWAY HISTORY NERD SIDE OF ME!

-Update-

Something like this:
[url=https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQAcwEHy68mUrU3Mb3l90T6s0fQ7Y5Sby9YtSbelSV5mWDb5srG]Revolver Rifle[/url]