I see you have no responses thus far. You are asking a difficult question. You should study the rifling process in detail before even beginning to shop for the tooling required to do it.
That machine looks way more complicated than it needs to be and I could not see the most critical part that is the cutter box. If you want to rifle a barrel the most important thing is the hole you start with, it has to be good, rifling comes second.Really I recommend building your own tool if you want to cut rifle a barrel, if you can't make the tool yourself you are not prepared to succeed in the rifling process anyway.