Armi San Marco brass-framed, single-action black powder percussion revolver, which is a modern Italian reproduction of the historic Colt Model 1851 Navy revolver, typically in .44 or .36 caliber. Key Features Design: Cap-and-ball single-action mechanism with an octagonal barrel and loading lever assembly. Materials: Blued steel barrel and cylinder, brass frame/backstrap, and a one-piece wooden grip. Origin: Modern replica intended for target shooting, collecting, or historical reenactment rather than an original 19th-century antique.