Product Summary
The ISMI Guide Recoil Spring Assembly is a complete drop-in replacement for the Sig Sauer P365, featuring a 15 lb spring mounted on a guide rod. ISMI is known for high-quality chrome-silicon springs that offer consistent performance and a long service life. The lighter 15 lb rating can reduce felt recoil and muzzle flip compared to a heavier factory spring, making it popular for range use, competition, or shooters running standard-pressure loads. As with any recoil spring change, test with your preferred ammunition to ensure reliable cycling.











