The Apex Duty/Carry Kit for the M&P Shield 45 was designed to provide the Shield pistol owner a smooth, consistent trigger pull that is approximately 2 lb lighter (based on variations in factory tolerances) with the advantages of shorter over-travel and more detectable trigger reset. All of the components work together to provide a pull weight within the acceptable range for a top end, service pistol. Features: Reduces trigger pull by approximately 2 lb Smooth uptake and reset Reduces over travel