Bug restriction: you cannot reload the original revolver; it will disappear after putting anything else into hands; you cannot reload the original revolver. Seems you loose the revolver after a reconnect.
Personally i think this has something to do with the fact that the pistol is occupying regular inventory space. Probably it should get a separate place like in the mod (in real life you can just put it in your pants/belt) so you cannot duplicate it by swapping the inventory part.