I'd like some clarification please. Using the Wildey as an example. If a person buys a 10" barrelled pistol and then later changes over to the carbine barrel and adds the stock, it's legal, correct? Would it then be illegal to buy the carbine and change it over to a pistol by doing the opposite? Or is it that if it has a stock on it, the barrel has to be over 16" and that's it? I assume this would apply to a Contender too?