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 do a complete upgrade. 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.Features :Drop-in Unit Performance 3.0 Connector4lb Reduced Power Striker Spring6lb Extra Power Striker SpringReduced Power Safety Block Plunger Spring6lb Extra Power Trigger SpringFits all GLOCK Gen 1-5 Pistols Except 42/43/43X/48