Just as the title reads, will they fit. Seems that some are less expensive than others because of the model. Don't know if the frame has changed at all between the two gens
I don't know for sure, but I would guess no. Threaded holes in the frame are probably in different locations, and the 5th Gen is slightly longer and wider than a 4th Gen.
i do not know if this is the case for all sliders but see this thread as [MENTION=59079]jdemello[/MENTION] explains that his x-wing sliders are not 4th gen and 5th gen compatible: