The KCI USA lower parts kit is a premium, precision-crafted solution for completing or upgrading your pistol build. Engineered for smooth functionality and long-lasting durability, this kit includes all essential internal components to ensure seamless fit and optimal performance. Ideal for gunsmiths, DIY builders and firearm enthusiasts, it meets strict manufacturing standards, delivering exceptional reliability and efficiency. Whether you’re assembling a new firearm or replacing worn parts, the KCI USA lower parts kit is a dependable, high-quality choice for superior performance.