HK 50248615 Mark 23 Black Detachable 12rd 45 ACP
https://www.tandktactical.com/shop/642230266780-hk-50248615-mark-23-black-detachable-12rd-45-acp-36775
https://www.tandktactical.com/web/image/product.template/36775/image_1920?unique=7d0cd62
This replacement or spare magazine is compatible with your HK Mark 23.
