If I remember right you need a push feed bolt head and all the parts, a magazine and a firing pin assembly.
SSS noted the firing pin assembly but I am not sure why the regular one would not work.

Its not really practical to convert a push feed rifle to a control feed as the action would have to be milled
but the other way round works.

IE I have a control feed magnum action that I now have set up as a push feed 270 win with a plunger ejector.