When I bought the Pro 9mm I did not know the difference between the Pro and the L. I should have bought the L model. But could not find one. I put the Apex sear and striker block in immediately after getting the Pro. The trigger pull was 5.5 lbs before and 4.5 lbs after. After about 2k rounds, the trigger is just under 4 lbs. I assume the performance center sear would have improved with time.

I first had a M&P 45 acp that I put in the Apex sear and striker block. It went from a 7.5 lb trigger to a 4 lb trigger.

I have replaced the Pro factory sight with Dawson adjustable rear sight and FO front. I kept hitting low with the factory sight. Definitely should have gotten the L model.