Hmmm, I've had my share of *other* issues with my PPS but have no issue using my trigger finger to hit the mag release. In fact, once I became accustomed to it I was faster with it than any other mag release. On the HK45 I use my thumb as it never felt natural to curl my finger back to hit the strong sideof the ambi mag release. On the Walther though I simply move slightly outside the trigger guard and press down. Feels very natural.