It depends on the Blackpowder revolver if it uses blackpowder cartridges it will be treated like a modern firearm if it is a cap and ball revolver it can be shipped directly to your residence (unless state/local laws prevent it)

Hi Earl, Black powder does not fall under the firearms laws. Unless you include the powder itself then it becomes hazmat. The ATF does not consider black powder to be a firearm at all. I'm not sure on Buds policy but i know I've had it shipped usps without issues.