Apex Tactical 100161 Action Enhancement Trigger & Duty/Carry Kit Black Drop-In Fits S&W M&P Shield 45This kit is a combination of the Apex Duty Carry Kit for the M&P Shield 45 and Shield 45 M2. 0 and the Apex Action Enhancement Trigger for the M&P Shield 45 and Shield 45 M2. 0. The Trigger Kit 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