COSMOPOLITAN ARMS COMPANY

.52 cal., lockplate marked "COSMOPOLITAN ARMS CO./HAMILTON O. US./GROSSF PATENT/1859", single shot falling block lever action, frame marked "UNION/RIFLE", 19 in. part octagon/part round barrel with sling ring on left sid...

.52 cal., lockplate marked "COSMOPOLITAN ARMS CO./HAMILTON O. US./GROSS PATENT" at rear, single shot falling back lever action, 31 in. part octagon/part round barrel with or without sling rings, adjustable rear and post front sigh...