My grandson now has my old CW9, so as reported I bought an S9 (on that $268 sale) to replace it.
Of course it comes with two factory mags with the plastic magazine base plates, plus I ordered three more factory 7 rounders with the same plastic bases. All five are extremely difficult to snap in the pistol properly.
Ordered two metal base plate sets from Kahr and just put them on, and the mags are easy to snap in place.
$40 including shipping is quite a racket.