I installed the Apex strikers in two my slides.
One of them had a noticeably rougher/longer trigger pull right there at the end before the sear released the striker.
I removed it (Apex) and laid it on the table side by side with the factory striker and you could see (what I call the dog leg sticking down from the rear of the striker that is caught/released by the sear) the Apex was longer, slightly. Okay, that's part of the difference in the trigger pull. I stoned/polished the dogleg where it contacts the sear and after a bit it was back to the feel I had prior to replacing the factory unit.
No light strike issues with either slide (FNS-C .40 and FNS long slide .40.)
The trigger pull is different than any other striker fired gun I have. You get used to it.
Accuracy?
My P07 .40 with 135 grain hollow points sitting on top a compressed charge of Blue Dot. Thirteen shots at 12 yds. off hand. Bottom round was a surprise. Bottom left round was me shooting at a hovering bumble bee between me and the target. I missed the bumble bee but he did leave and stop flying around between me and the target.
Attached FileI tried Federal, Remington, Winchester FMJ and hollow points in the FNS .40's. The 135 grain hollow points, too. Best was the Winchester 180 grain hollow points in the 5" FNS. Really not too bad. Not as good as the smaller P07. I wouldn't object to open carry with a big gun like the FNS long slide, but I'm not going to try to conceal carry the long slide.
Attached FileI'll repeat, the FNS series of pistols has a lot of things going for it I like. It's a decently long list. Some are subtle and you don't realize it unless you tear into it and realize what the purpose is, or the function.
Oh, picture of the factory striker and Apex striker side by side. You can see the Apex striker is 'beefier" than the factory striker.
Attached File