How Many Different M&P 2.0 Frames Are There???

[SmokinLoon]

I ask because I recently found out the hard way that the 3.6in "compact" and the 4.0in "compact are not just two different barrel and slide lengths but also two different frames. Four frames, four barrel lengths, three standard magazine sizes ... full with 5 or 4.5in/17rd (one frame for both barrel lengths), compact 4in/15rd, compact 3.6in/15rd, subcompact 3.6in/12rd... is that all of them???