A 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 mounted pivoting safety maintains factory safety values. Compatible with the following Gen3 and Gen4 Glock model pistols- G17/17L/19/22/23/24/26/27/31/32/33/34/35. *Does not fit- the 10mm, .45 ACP or .45 GAP caliber Glock models. Not for use in Gen 5 models. **Trigger bar finish may vary- Matte Nickel or Bright Nickel finish.