The Apex Action Enhancement Aluminum Trigger & Duty/Carry Kit for M&P (9/40 only) replaces the factory trigger, sear and safety plunger to deliver a smooth, crisp trigger pull thats ideal for duty/carry purposes.Features :Keeps pistol at a safe 5-5.5 lb. trigger pull weightReduces trigger pre-travel and over-travel by approx. 20%Smooths trigger pullReduces reset