TR-1 Upgrade Defense Spring Kit (4.96lbs) | Glock Gen 1-4

Spring Kit designed to optimise Glock pistols for carry and duty. Higher spring compression than the Challenge Kit. Easy to assemble, they are designed to give your defensive firearm a smooth and efficient trigger pull, with harder primer strikes. Approx weight of striker spring: 4.96lbs Developed based on feedback from military and law enforcement personnel. The Challenge Kit consists of 3 defense springs :   TR-1 Striker Spring (4.96lbs) TR-1 Trigger Spring TR-1 Firing Pin Safety Spring Compatible with: Glock 17 (Gen 1 – 4) / 17C (Gen 1-3) / 17L (Gen 1-3) / 19 (Gen 1 – 3) / 22 (Gen 1 – 3) / 22C (Gen 1-3) / 23 (Gen 4) / 23C (Gen 1-3) / 24 (Gen 1 – 3) / 26 (Gen 1-4) / 27 (Gen 1-3) / 32 (Gen 1-4) / 33 (Gen 1-4) / 34 (Gen 1-4) / 35 (Gen 1-4)