ATI ATIM20BD10 Bulldog 10rd 20 Gauge Black Steel
https://www.tandktactical.com/shop/819644026372-ati-atim20bd10-bulldog-10rd-20-gauge-black-steel-24150
https://www.tandktactical.com/web/image/product.template/24150/image_1920?unique=21f7992
Magazine is compatible with the ATI Bulldog 20 gauge.