Browning 112025050 BAR 4rd 308 Win/243 Win Browning BAR MKIII/BAR ShortTrac Short Action Black Steel
http://www.tandktactical.com/shop/023614199526-browning-112025050-bar-4rd-308-win-243-win-browning-bar-mkiii-bar-shorttrac-short-action-black-steel-4804
http://www.tandktactical.com/web/image/product.template/4804/image_1920?unique=3c4a6ba
This magazine is a detachable box magazine for the BAR and is designed to fit onto the unique hinged floorplate.