Have a 99 with a smooth trigger thought that this wouldn't be original?
Some are better than others.
Then too , 99 triggers can be improved but not many have the know how. I suspect that more have been buggered than have actually have been improved upon.
I have a 99F 358 that would fire upon closing when I bought it , a result of Bubba "fixing" the trigger. Replacement parts were required to put it back right.
Mike