I picked up my 2.0 compact 9mm today. Trigger was gritty. It was the ramp on the trigger bar that actuates the striker safety plunger. That, and there was a definite break-over point that had a very prominent feel as the trigger bar ramp topped out over the plunger. I didn't like that at all.
The ramp had a small machining nick that I could catch a nail on and the face of the ramp was just generally rough. I took a diamond file to the ramp face and smoothed it, then put a little more radius at each end of the ramp that allows the ramp to engage the plunger smoother and also to smooth out the break -over as it tops out over the plunger then polished the area.
Much better. One continuous smooth pull now, except for a little inconsistent grittiness and sticking of the plunger that I can feel now so I'll be removing it for polishing.