Like the Army model, Cimarron's 1872 Open Top Navy is accurately reproduced in every detail down to the 1851 Navy-sized grips, just like the early-production 19th century Open Tops were made with. Further, this quality replica is chambered for the frontier favorites of .45 Colt, and can be obtained in Standard Blue and color case hardened finish in 5 1/2 inch barrel with the 1851 Navy-sized walnut grips. - CALIBER .45 LONG COLT - SIGHTS Blade Front, Notched Barrel Rear - GRIPS Two Piece Walnut