I believe you can get close. I not sure what springs.. I think duty. read the M&P forums that's where I read about it
I installed just the "comp spring kit" but used my stock firing pin and trigger springs approx. 4lbs (not certain about trigger spring on FSS kit...)
Help me out, I'm still having dead trigger symptoms with my apex FSS kit and can't remember...do I close the trigger bar loop or open the trigger bar loop? Thanks!