The Apex polymer action enhancement trigger directly replaces the factory hinged trigger with a solid body polymer trigger, and a center mounted pivoting safety. The rounded face of the trigger provides a smooth comfortable surface for the shooter's finger while firing. The trigger also reduces pre-travel and over-travel by approximately 20% from the factory trigger. The Apex Duty/Carry Kit is engineered to provide the M&P (9mm and .40S&W only) pistol owner a smooth, consistent 5.0 to 5.5 lb. trigger pull with the advantages of shorter over-travel and shortened trigger reset. All of the components work together to provide a pull weight within the acceptable range for a top end, service pistol. The kit itself is designed to be drop-in and should not require further gunsmithing, however, armorer or gunsmith installation is recommended. Features: Smooths trigger pull Reduces trigger pre-travel and over-travel by approximately 20% Reduces reset length Keeps pistol at a safe 5 to 5.5 lb trigger pull weight for duty/carry applications Center mounted pivoting safety maintains factory safety values