ATI ATIM20BD10 Bulldog 10rd 410 Gauge Black Steel
https://www.tandktactical.com/shop/819644026389-ati-atim20bd10-bulldog-10rd-410-gauge-black-steel-24153
https://www.tandktactical.com/web/image/product.template/24153/image_1920?unique=4b4eecc
Magazine is compatible with the ATI Bulldog 410 gauge.