LANTAC S-KIT Upgrade Spring Kit Glock 17/19 Gen1-4 4lb Firing Spring. Installed in just a few minutes these Pistol Springs & Parts created by Lantac PSP Pistol Spring Kits reduce friction caused by the firing pin plunger engaging with the trigger bar for a smoother trigger pull. With nearly 30percent more power the Lantac Glock 17/19 Gen 1-4 Spring Set reduces overall trigger pull weight by as much as 1 pound significantly improving your shooting experience. Each spring in this Lantac Glock 17/19 Generation 1-4 Spring Kit is calibrated and tempered to deliver consistent force through the entire compression cycle for reliable operation every time your pistol is fired. Each kit comes with a 6.0Lb reduced power trigger spring and a 6.0lb increased power trigger spring providing an ideal balance of performance and reliability. You can choose the springs that work best for your shooting environment needs and lifestyle when you shop for your spring kit with our spring finder. Specifications for LANTAC S-KIT Upgrade Glock 17/19 Gen1-4 Spring Kit: Manufacturer: LANTAC Gun Make: Glock Gun Model: Glock 17 Glock 19 Model Generation: 4 3 2 1 Features of LANTAC S-KIT Upgrade Glock 17/19 Gen1-4 Spring Kit: Upgrade Spring Kits available in 4 different spring strengths. 4.0lb Firing Pin Spring (For Target Competition & Sporting Use) 4.5lb Firing Pin Spring 6.0lb Firing Pin Spring (For Carry & Self Defense Use) 6.5lb Firing Pin Spring (Maximum Reliability) Included Accessories: x1 of either: x1 6.0Lb Increased Power Trigger Spring x1 Reduced Power Firing Pin Safety Spring Package Contents: LANTAC S-KIT Upgrade Glock 17/19 Gen1-4 Spring Kit What firearm models does the manufacturer say LANTAC S-KIT Upgrade Glock 17/19 Gen1-4 Spring Kit is compatible with? The manufacturer says that LANTAC S-KIT Upgrade Glock 17/19 Gen1-4 Spring Kit is compatible with Glock 19 Glock 17LANTAC 01-GP-4-USS: S-KIT Upgrade Spring Kit Glock 17/19 Gen1-4 4lb Firing Spring