Introducing the True Precision Recoil Spring Tuning Kit. Get the most out of your compensated or suppressed pistol with this recoil spring tuning kit from True Precision. Built from high-strength chrome silicon, these springs offer consistent, long-lasting performance. This kit includes multiple spring weights to help you fine-tune your setup for reliable cycling and reduced recoil with different ammo and muzzle devices. FeaturesSprings are made from high-strength chrome silicon for long-lasting durabilityIncludes stainless steel billet-machined non-captured guide rod with steel bushing. Non-captured guide rods allow for quick and easy spring changes.Kit includes multiple spring weights