Alexander Arms MEB5010 AR-15 10rd 50 Beowulf Black Steel
http://www.tandktactical.com/shop/819511020090-alexander-arms-meb5010-ar-15-10rd-50-beowulf-black-steel-7386
http://www.tandktactical.com/web/image/product.template/7386/image_1920?unique=0018a6f
Alexander Arms magazine for your AR-15.