To mount a stock on the pistol if you are going to SBR it ---- you will need to purchase what is called the "Rear Head" ---- which runs between $35-50.00 depending on where you buy it. They are on the CZ USA Website and GunBroker. No matter what type of stock you put on it, you will have to have a "Rear Head" of some sort----it replaces the rear head that is now on pistol and just has a sling attachment. If you are talking about the carbine, it already has the rear head mounting the stock, but if you wanted other than factory stocks, you would have to get a rear head compatible with that stock (and would probably come with it anyway)