The Ed Brown 18lb Commander Recoil Spring is designed specifically for the 1911 Commander model ensuring optimal performance and reliability. Engineered to handle an 18-pound load this recoil spring is ideal for those seeking enhanced durability and smooth cycling in their Commander-sized 1911 pistols. Its high-quality construction promises longevity and consistent function making it an essential upgrade for any 1911 Commander enthusiast looking to maintain peak firearm performance.