Relatively little is known about these post-war breech loading rifles. Only a few prototypes/trials rifles and carbines were likely produced around 1867. Some of the components are clearly adapted from the Bridesburg Civil War rifle-muskets. The operation is somewhat similar to the Remington rolling block design. Pulling the breech block open also cocks the hammer. This one was originally rimfire but was converted to centerfire. See "The Men Behind the Guns" by John Walter in "Classic Arms & Militaria" from June/July 2016 for patent diagrams and images of the carbine version submitted to trials in 1867 as well as information about Barton H. Jenks. During the Civil War, Alfred Jenks & Son ran the Bridesburg Armory and manufactured around 200 rifle-muskets a day for the Union war effort. The company's usual products in peace were textile related equipment. Barton Howard Jenks (1824-1896), son of Alfred Jenks and nephew of fellow arms inventor William Jenks, also raised and armed the "Bridesburg Volunteers" to defend his home state of Pennsylvania. The left side of the frame is marked "BARTON. H. JENKS/eagle head/PHILADELPHIA/U.S," and the upper tang has "MODEL/1867." The front sight is absent, and the rear sight is the same as those used on the Civil War rifle-muskets.