Pedro, This Chiappa model does not have the option to change cylinders. Heritage has two similar models that have 22 lr and 22 mag conversions. Heritage Manufacturing Models RR22MB4 and RR22MCH6 Both under $170.

Pedro, unfortunately no Sir. I would look at the pre-configured Combo that comes with both 22LR and 22Magnum Cylinders here : budsgunshop.com/product_info.php/products_id/87903/heritage+manufacturing+rough+rider+22lr%2f22mag+475%22+blued -------- or --------- budsgunshop.com/product_info.php/products_id/87944/heritage+manufacturing+rough+rider+6rd+22lr%2f22mag+65%22+jonny+boy

no Chiappa does not make a 22mag cylinder that fits I suggest that you just get the Heritage rough rider with both cylinders budsgunshop.com/product_info.php/products_id/87903/heritage+manufacturing+rough+rider+22lr%2f22mag+475%22+blued To have a cylinder made/modified and fitted would cost more that the Rough rider