Apex Tactical Specialties Shield Action Enhancement Trigger And Duty Carry Kit For M&P Shield (9/40 Only). Kit Includes: Action Enhancement Trigger Slave Pin Fully Machined .45 Sear Ultimate Striker Block Striker Block Spring Talon Tactical Tool Shield Carry Spring Set Sear Spring (1/8") Trigger Return Spring Black Finish Product Type: Kit Finish/Color: Black Description: Shield Action Enhancement Trigger and Duty Carry K