True Precision Recoil Spring Tuning Kit Features The True Precision Recoil Spring Tuning Kit targets the specific challenge of running a Glock 43 43X 48 or similar sub-compact 43-platform pistol with a compensator or suppressor attached where the added weight and gas dynamics can disrupt reliable cycling. Three spring weights 15 17 and 19 pounds let the shooter test different combinations until the pistol cycles consistently with its particular ammunition and muzzle device setup. Each spring is made from high-strength chrome silicon a material chosen for its ability to hold up through more than 20 000 compressions without losing its working tension. That durability means the shooter can tune and retune the system over time without worrying about premature spring fatigue. A stainless steel billet-machined non-captured guide rod ships with the kit replacing the factory guide rod with a more precisely machined component built to complement the tuned springs. Because the kit is designed specifically around compensated and suppressed configurations it addresses a problem factory recoil springs are not built to solve. Made 100% in the USA the kit reflects True Precision s focus on domestic manufacturing and tight tolerances. For any shooter running a modified Glock 43-platform pistol this tuning kit offers a practical path to dependable repeatable cycling. True Precision Recoil Spring Tuning Kit Specifications Manufacturer: True Precision Model: Recoil Spring Tuning Kit Compatible Hosts: Glock 43 43X 48 and Similar Type: Spring Color: Black Includes: 15 lb 17 lb 19 lb Springs Guide Rod Available At: GrabAGun