Rock Island 54181 TCM 10rd 22 TCM Black Steel
https://www.tandktactical.com/shop/812285026206-rock-island-54181-tcm-10rd-22-tcm-black-steel-24725
https://www.tandktactical.com/web/image/product.template/24725/image_1920?unique=4f41fb4
This replacement or spare magazine is compatible with your Rock Island TCM.
