Through a little research I think I answered my own question. You can convert a pistol into a rifle as long as the barrel is over 16" in length and the overall length is at least 26". And you can convert it back to pistol configuration. The Charger is considered a "pistol", so I think I can do the conversion if i want. HMMMMMMMMMMMMMMMMMM....... I am digging the idea of having a target style, custom 10-22 for under $300.00 and having the charger configuration, too. If I am wrong, please let me know.
I've seen one like this and to keep it over 26", the barrel needs to be over 17". IIRC