ATI / Schmeisser 60 Round AR-15 5.56 / 223 Magazine
60 round ATI AR-15 magazine. Made by Schmeisser in Germany. For 223 / 5.56. Stamped on the packaging is the notice:
Not recommended for flawless performance when using 300 BLK ammunition. Last round bolt hold open may not be consistent in some AR lower receivers.