ATI ATIM556S60WMLE: American Tactical partnered with German arms manufacturer Schmeisser to import and distribute the Schmeisser S60 60 round AR-15 magazine. Manufactured from glass-reinforced polymer, this patent-pending magazine features a unique follower system that allows for double the capacity of a standard AR-15 magazine without the bulkiness. Designed to shoot both .223 and 5.56, the Schmeisser S60 will give you an instant capacity upgrade over the standard AR mag at an affordable price. This newest version includes a window on the side to add a visual queue of how much ammo is still in the mag.