The Action Enhancement Kit for Glock pistols features the Apex Action Enhancement Red Trigger with Gen3-4 Factory Trigger Bar Apex Ultimate Safety Plunger for Glock and Apex Performance Connector. The kit is a direct drop-in replacement of the factory polymer trigger safety plunger and connector and provides for a smoother trigger pull with reduced travel reduced reset a crisp break and approximately a one lb. reduction in trigger pull weight. Compatible w/Glock Gen3-4 17/17L/19/22-27/31-35.