The Traditions 1858 Army Spare Cylinder is a factory replacement spare part for the Pietta 1858 Army revolver. This spare cylinder helps save time at the range by having extra cylinder prepared ahead of time. This solid steel cylinder is not a conversion cylinder. FeaturesSolid steel constructionSpare for the Pietta 44 Caliber ArmyFactory replacement partNote This is not a conversion cylinder Only compatible with Pietta 1858 revolvers