SAR USA ST4510 ST45 10rd 45 ACP Black Steel
https://www.tandktactical.com/shop/858763007879-sar-usa-st4510-st45-10rd-45-acp-black-steel-21690
https://www.tandktactical.com/web/image/product.template/21690/image_1920?unique=d5547a4
This replacement or spare magazine is compatible with your SAR USA ST45.
