Steyr Arms Magazine, 9MM, 28 Rounds, Fits Steyr AUG, Clear 1263050510 This 28 round 9mm magazine fits a standard AUG stock and is designed to work with the AUG 9X19mm Police Training Kit. This magazine will not fit a NATO stock. This magazine must be used in conjunction with the 9mm Trigger Pack that includes the ejector on the last-round-bolt-hold-open.