These attributes provide you the fastest and the most accurate first shot hit, of any self-defense Glock style trigger. The EVO Elite corrects the Glock bump or glitch, this is the pre-travel resistance that is felt when the trigger bar bumps into the connector. This bump forces the need to apply excessive force the moves the pistol off target, making the shot go low and to one side. The EVO ELITE is the best self-defense connector, only by changing a few springs to have the best sport or enhanced self-defense trigger connector. The Ghost Complete Drop in Spring Kit gives your Glock a smooth, crisp, lightened Trigger pull that helps promote consistent, match-grade accuracy. You can change specific springs to improve a particular aspect of the trigger pull, or even a complete upgrade. The Accurately calibrated spring weights deliver consistent force through the entire compression and release cycle to give you a light, refined trigger pull without sacrificing the reliability of your pistols Safe Action system. Trigger Spring has nearly 30% more power than factory spring, which actually reduces pull by as much as 1 lb. for improved control. This produces faster trigger reset for quicker follow up shots. Reduced power Safety Spring reduces friction caused by the firing pin safety, further smoothing the pull. Striker Spring is designed for improved consistency and durability over factory spring. NOTE : THIS IS NOT A DROP IN TRIGGER CONNECTOR MINOR FITTING IS NEEDED. The EVO ELITE requires the trigger control tab (TCT) to be trimmed a just little bit at a time until the weapon dry fires. Once it is fit the limited movement beyond the firing pin release will correct the right or left drift. Please Note: The 4.0 lb Firing Pin Spring may cause light primer strikes in some pistols and this is the Target/Sport configuration. For Self Defense or in a 10mm or 45 caliber GLOCK we recommend the 6.0 lb firing pin spring or keep stock firing pin spring and use the 6 lb. trigger spring and the reduced power safety plunger spring. Included in the kit are 4 Drop in Springs: 1 - 4 lb Reduced Power Striker Spring- to only be used for a strictly target or competition set up. 1 - 6 lb Extra Power Striker Spring- use this to increase the strike power and makes for a faster reset. 1 Reduced Power Safety Block Plunger Spring- smooth out the bump as the safety plunger is engaged. 1 - 6 lb Extra Power Trigger Spring (Extra power reduces the pull weight)- The heavier weight offsets the added weight of the striker. This is an assisting spring and lightens up the trigger press. This spring is not used on GEN 5 Glocks.