Apex Tactical Specialties Action Enhancement Kit CZ 75 B Black. The hammer and sear have matching Apex engineered single-action engagement surfaces that yield a clean consistent single-action style trigger break while providing a smooth stack-free double-action. The matched sear and hammer engagement surfaces require eliminate the need for any polishing or stoning. Specifications for Apex Tactical Specialties 116142 Action Enhancement Kit CZ 75 B Black: Manufacturer: Apex Tactical Specialties Finish: Black