Enhance your Sig Sauer P365 with this precisely engineered recoil spring assembly designed exclusively for the 3.1" barrel 9mm model. Crafted to ensure optimal performance and reliability this factory replacement ensures smooth and consistent cycling. Ideal for maintaining the original functionality of your P365 this assembly is a must-have for enthusiasts seeking dependable operation. Please note it is not compatible with P365 XL or P365380 models making it a specialized choice for the standard P365 configuration.