Apex Tactical 102P155 Action Enhancement Slim Red Drop-In Compatible w/Glock Gen3-4 17/19/22-27/31/32/33/34/35A must for any Glock owner the Action Enhancement Kit features the Apex Polymer Action Enhancement Trigger with a Gen 3 trigger bar, an Apex Ultimate Safety Plunger and an Apex Performance Connector. Direct drop in replacement parts, no fitting required. These drop in parts will reduce trigger pull weight by approximately one pound; reduce trigger pre travel, overall travel and reset distance; smooth uptake and reset; crisp trigger break; center