Ruger 90700 Ruger-5.7 20rd 5.7x28mm Black Oxide Steel
http://www.tandktactical.com/shop/736676907007-ruger-90700-ruger-5-7-20rd-5-7x28mm-black-oxide-steel-21612
http://www.tandktactical.com/web/image/product.template/21612/image_1920?unique=a5b45b8
This replacement or spare magazine is compatible with your Ruger 57. Made in the USA.
