High-quality recoil spring exactly matches your Colt Commander’s original 18 lb. factory spring to ensure reliable function with the widest range of standard-power ammo. Improve performance by replacing a fatigued spring to return an older gun to factory specs. May also be used as an extra power spring for 9mm/.38 Super pistols. Comes with an extra power firing pin spring that keeps the firing pin stop in place and prevents firing pin “float.” SPECS: Spring steel, 18 lb. Fits Colt Commander and clones. Includes extra power firing pin spring.