What are they there for? I have been experimenting with the way I grip my 19 and have found that if I wrap my left index finger across the front of the trigger guard where the teeth are located, I seem to have a stronger grip hence better recoil control on the 19. Have never seen a video or in person of anyone doing this, wondering why not. It does not contact my trigger finger at all. Pros and cons please before I incorporate this style grip to muscle memory.