Apex Tactical 100056 Action Enhancement Trigger & Duty/Carry Kit 9mm Luger/40 S&W Red Drop-In Fits S&W M&P ShieldThis kit is a combination of the Apex Duty Carry Kit for the M&P Shield and the Apex Action Enhancement Red Trigger for the M&P Shield. The Action Enhancement Trigger directly replaces the factory hinged trigger with a solid aluminum trigger body which reduces pre travel and over travel by approximately 20%. It features a smooth face with a center mounted pivoting safety that maintains factory safety values. The Apex Duty Carry Kit was designed to