The ambidextrous lower parts kit includes all controls needed for a fully ambidextrous AR-15 lower build. KAK Industry builds this kit with a safety selector, bolt catch, and magazine release for both hands. Each part fits standard mil-spec AR-15 lower receivers without extra machining. In addition, this kit gives left-handed shooters the same control access as right-handed shooters. All components install with standard tools and hardware. Therefore, builders gain a complete ambidextrous control setup in one package. Daytona Tactical stocks this kit for custom AR-15 lower builds.