Looking to close the gap between the double-action and single-action trigger pulls on your CZ Shadow 2? The Apex Tactical CZ Shadow 2 Action Enhancement Kit is made to trim down the difference between these two pulls, allowing shooters to be more-consistent with their trigger pulls, thereby leading to enhanced performance on the range. When used with the Carry Mainspring, the double-action pull measures 6 pounds, while the single-action pull measures 4 pounds. If the Competition Mainspring is installed, the double-action pull drops to 5.5 pounds, while the single-action pull measures 3.5 pounds. Each Apex Tactical Action Enhancement Kit includes direct replacement parts for the factory hammer and sear. These precision-machined components are designed to provide a clean trigger break in single-action combined with a smooth, stack-free double-action pull that's consistent all the way through the firing process. Sear and hammer engagement surfaces are matched, so no stoning is required for a precision fit. This kit will not work in pistols equipped with the B series firing-pin block.