I recently ordered a new compact large grip module for my P320, and it was pretty hard to find. I was a little disappointed to get a Gen 1 module but as the compact grips are almost impossible to find, I can live with that. The issue I have is that the mold line in the back of the grip is very pronounced, enough that it digs into my skin as I hold the pistol. My other two frames have visible mold lines, but you can't feel them.
Any of you guys get grips with this issue? Is it alright to just sand it down?