Thanks MarkV, the fact that there were no close up pictures of the mount and rail bothered me which was why I posted the question. I missed the lined...
There is an ols saying "the cheap comes out expensive" by the time you fix up that carbine you will have a lot of money tied up and it will still be...
IMO the FXO magazines are incorrect for the Luger you are interested in. I have afew German weapons dated later than that and they all have matching...