Although it appears to be a conversion, the 1871-72 open top model was colts first revolver specifically manufactured to fire a centerfire cartridge by incorporating the loading gate in the frame.Since colt did not use percussion revolver parts, the revolver was manufactured as an entirely new model, first with navy-sized grips, later with army-sized grips.The hickok model is a modern twist on the classic open top that features a snub nose barrel.This model features a case-hardened forged steel frame, round barrel with front blade sight, no ejector rod, blued steel grip parts, an army-sized walnut grip, and a rear sight notch on the rear of the barrel.Frame Description: Color Case Hardened SteelAction: SAOCaliber: 45 Colt (LC)Barrel Length: 3.50"Capacity: 6rdHammer Style: ExposedGrips: Walnut Army SizeSights: Blade Front, Fixed RearWeight: 2.20 lbsCylinder Finish: BluedBarrel Finish: BluedOal: 9.30"Barrel Length Range: 3" to 3.99"Weight Range: 2 lbs to 2.99 lbs