I've been on a plastic pistol kick for the last two years buying up a few. However with all the hubbub lately on striker fired pistols and which ones have the best trigger pulls, I figured I'll chime in as well.
I'll make the trigger pull comparison between the following pistols: FN FNS, Walther PPQ M1, Springfield XDM, SW M&P Pro CORE, Steyr S9A1, Glock 22. With the exception of the Glock Fotie (which I was not professional enough to handle), the pistols are all 9mm and all mine.
I also wanted to say that none of these pistols are bad shooters. They all shoot very well for me, though some are more enjoyable than others in various subjective ways. I know that I always poke fun at the mechanical accuracies of these water guns, but in actuality they all have superb mechanical accuries. Not good wheelgun accuracy, but damn good otherwise. All are capable of 1-holers at 7-yds in a good hand.
Maybe I'll add the HK VP9 next year when I buy one, and perhaps I can borrow a SIG P320 from somebody (the brother ain't buying any more American SIGs).
Anyway, here is my ranking of these guns' trigger pulls:
1. Steyr S9A1 - hands down the best trigger pull in term of lightness, crisp break, short reset.
2. Walther PPQ M1 - close to the Steyr but no cigar. Very close. Reset was just a hair longer, but light & clean pull. Kudos to Walther because the PPX I handled was blah.
3. Glock 22 - it felt just like my G17 and a bit better than my G20 Still Fat. The original staple gun trigger pull which is better than I give credit for. Short reset and crisp break but with that weird spoingggg
feeling. Though it's not very far off the PPQ.
4. M&P Pro CORE - I understand that this gun has a better factory trigger than the standard M&P, but it's all I've got. Trigger is the lightest of all, but there's more of a take-up than the S9A1 and PPQ. The reset is still too vague though an improvement over the standard M&P. During Mozambique drills or rapid fire drills, I sometimes didn't let the trigger reset enough because of the lack of reset feel.
5. XDM - it's good but not outstanding in either lightness, crisp break or reset.
6. FNS9 - trigger pull is noticeably heavier than the rest, definitely not a favorite when it comes to bullseye slow fire shooting. Doesn't seem to affect rapid fire/combat type shooting any. Not a lot of slack, which is nice. Breaks clean but with the spoinggg
feel like the Glock, and reset is also noticeably longer than the other pistols. The wide trigger face doesn't help either.
Anyway, that's my opinion and I'm sticking to it!!!
PS I did rent a Ruger SR9 a couple of times from two different shops/indoors ranges. As far as I'm concerned, it's not even close to being in the league with the above vis-a-vis trigger pull quality. I don't even know if I could say that it's better than the SIGMA.