The Action Enhancement Kit for standard frame Gen 3 and Gen 4 pistols features the Apex Polymer Action Enhancement Trigger, with Trigger Bar, an Apex Performance Connector and Apex Ultimate Safety Plunger. The Action Enhancement Kit for standard frame Gen 3 and Gen 4 pistols features the Apex Polymer Action. The kit is a direct drop-in replacement of the factory polymer trigger, connector and striker plunger, and provides for a smoother trigger pull with reduced trigger pull weight, reduced travel, reduced reset and a crisp break.