The True Precision Recoil Spring Tuning Kit is engineered for Glock 43 43X 48 and similar sub-compact platforms providing optimal performance for compensated or suppressed setups.True Precision Recoil Spring Tuning Kit for Glock 43 SeriesHigh-strength chrome-silicon construction rated for 20 000+ compressionsIncludes 15-LB 17-LB and 19-LB spring weights for custom tuningStainless steel billet-machined non-captured guide rod includedCompatible with PSA Micro Dagger and other similar platforms100% Made in the USAPerfect for shooters looking to fine-tune their pistol's cycling performance and reduce felt recoil when using different ammunition types or muzzle devices. This comprehensive kit allows for precise customization to achieve reliable function with various configurations.