APS / PPS Shotgun will fit M&P M870 Folding stock ??

[phobus]

Hi guys just wondered if anyone in the know ( trader maybe ) if the M&P fold over stock fits PPS shotguns ? I just acquired one with the M4 sliding stock which I dislike , and was wanting to swap them over ? ******* has them in stock but did not want to commit unless I was pretty sure . Blurb states will fit MOST m870 models : Maruzen / Tanaka / M&P of course . Anyone have any idea cheers guys ? Carl