Upgrade your Glock G17/G19 with the E-CTG9 trigger by Lantac. This drop in trigger can be configured for self-defense and competition applications, and can be finely tuned to the user's preference. The moving parts have been optimized to reduce friction to ensure less resistance and smoother operation. The pivot pin and trigger bar have also been enhanced to provide excellent leverage without much force, and the hybrid bow face is a perfect combination of curved and flat surfacing for comfort and ergonomics. This package ships with: x1 4.0Lb Firing Pin Spring (For Target, Competition & Sporting Use)x1 4.5Lb Firing Pin Spring (For Tuning Trigger Pull)x1 6.0Lb Firing Pin Spring (For Carry & Self Defense Use)x1 6.0Lb Increased Power Trigger Springx1 Reduced Power Firing Pin Safety Spring & Ultra Smooth Safety Plunger. Lantac Glock E-CTG9 Trigger for G17 & G19 Gen1-3 01-GP-ECT69-13-1719