Pietta 1851 Rebel Confederate Navy Blued 44 Caliber Black Powder Revolver - 6 Rounds - A very popular revolver for its time, the model 1851 Navy revolver was adopted by both the U.S. and British military. This brass frame revolver has a non-engraved cylinder. This reproduction is available in .44. caliber with a 7 1/2in barrel length. Manufactured by F.LLI Pietta, Italy. Rifling/Twist: 1: 30in Single Action .44 Caliber (Non-Engraved) .452-.454 ball diameter Barrel: 7-3/8in, Octagonal 1851 Rebel Brass Frame