Manufactured by Louis Perrin c.1873~80′s in paris, France - based on his Mle1865 revolver design - serial number 413. 11mm73 six-round cylinder, double action, side-loading gate with manual ejector rod, leaf sight, military foregrip and buckles. Originally presented in its prototype stage along with its handgun counterpart to the French army as concurrents to the Chassepot rifle and Lefaucheux revolver, the Perrin Mle1865 was rejected on both occasion. It was however a very popular private purchase for French officers, especially in the Army where the service pistols were still percussion designs. I doubt that the prototype carbine presented by Perrin was in a serious military rifle caliber, which might have been why it lost to the Chassepot despite arguably using superior technology. This particular example was manufactured well after that however, since it is chambered for the same round used in the MAS Mle1873 revolver.
Designed by Eugene Lefaucheux, manufactured for the American Civil War, later converted to centerfire. 11mm Perrin, single action, side loading gate, lanyard ring. I don’t know what advantage this gave its owner, considering 12mm pinfire cartridges were much more abundant. At least that’s how it was in the old world.