if you have the money, and a real desire for night sights on the PF9, you might take the slide to a good smith and have the dovetails cut to add sights. Other than that, you are probably out of luck with the KT. (I wanted them on my PF9 as well.. just not enough to follow my own recommendation)
I have a Kel-Tec P-11. I'm tempted to get improved sights for it as well. For the time being it's my home defense handgun if I don't have my G26 handy. I'll have to do some online research to see if there are upgraded sights for my KT P-11.
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