Dino44,
On the right side of a 6'' PPC9 it is stamped 5906. Didn't say ''Model 5906''
Left mag is a 10 round with extended mag base. Middle is a 15 round with extended mag base. Right one is a 15 round with standard mag base. When you ordered a 5'' or 6'' PPC9 you got 3 mags with extended mag...