The FN FN 509M 9mm 24RD Sleeve Black is a testament to FN's commitment to quality and precision engineering. Designed for seamless integration with your FN 509M, this magazine sleeve enhances grip consistency and recoil control, ensuring a smooth and reliable shooting experience. Ideal for range time and training, this accessory bridges the gap between your compact frame and extended magazine, offering both capacity and comfort. FN is renowned for its innovative designs and dependable performance.