[b said:

Don't forget that the modification was done to a P99 QA so, like a Glock, there is no second strike capability (unless the user partially racks the slide).
I was worried about this modification as well. Two gunsmiths I had spoken with about reducing trigger pull on the QA thought nothing could be done until a kit comes out. When I asked them about cutting coils from the striker spring, they believed it would compromise the gun's reliability. It looks like they were right...