Nope - I heard the psychic command of the P99 calling me here.
U want the QA trigger then. Most P99 fans do not like that trigger - we like the A/S, because the SA is so sweet at the range.
But, the QA trigger will be like your XD trigger - the same on every shot. It's heavier than the SA pull on the A/S, however. But, it is a short trigger pull, so that kinda makes up for the added weight.