Sako S5C265030 A7 3rd 223 Rem/5.56x45mm Black Polymer
http://www.tandktactical.com/shop/082442860428-sako-s5c265030-a7-3rd-223-rem-5-56x45mm-black-polymer-936
http://www.tandktactical.com/web/image/product.template/936/image_1920?unique=350b902
This replacement or spare magazine is compatible with your Sako A7.
