FN 201003462 509 10rd 9mm Luger Black/Flat Dark Earth Steel
http://www.tandktactical.com/shop/845737010096-fn-201003462-509-10rd-9mm-luger-black-flat-dark-earth-steel-17469
http://www.tandktactical.com/web/image/product.template/17469/image_1920?unique=6aa1c59
This magazine is compatible with your FN 509. *Note- Will not work with FNS TM or FNX TM series pistols.
