The P2K-SK P/VP P/VP-SK P2K USP9c mags are the same body/lip/follower, the difference is the oem-sleeve/xgrip-sleeve/baseplate.
Note the P/VP-SK isn’t sanctioned by HK for the P2K (yes it may function/fire but it is not an exact HK fit/application), why it is reported to trim the sleeve front lip.
So the 13 round vp9 sk and the 10 round sk pinky finger grip mags both fit and function fine in my P2000sk. Both both feel really nice. Much better than the P2000 pinky finger grip
I have a P2000SK for EDC, too, and the 13/15-rd mags actually needs a bit of modification to fit properly. The area circled in Red is where it needs mod.
Mine fit 100% too without any modifications. Especially fond of the 13rd mags!! I dislike the original p2000sk baseplates. I took Dremel to them and now they are much better.