Keep your 5" full size 1911 handgun performing at its best with a Wilson Combat recoil spring. This recoil spring is designed to improve your shooting experience by reducing the frame-to-slide impact when firing. With an average service life of 15,000 rounds, this quality component should be replaced accordingly for optimal performance. Enjoy smooth and reliable cycling with the Wilson Combat 5" full size 18lb recoil spring.These chrome silicon steel recoil springs resist taking a set even after thousands of compression cycles for improved performance and reliability over standard music wire springs. They are the top choice of competition shooters seeking the longest in spring life. FeaturesFits: 5" Full sizeService Life: 15,000 roundsChrome silicon coatedImproves cycling and overall operation