Tough, quiet, and incredibly enjoyable to shoot, the DS Series shares many features with the DSX, enhanced by M-Kore Technology. Recommended for barrels 10.3” and longer, the DS Series is designed to endure the toughest conditions and is rated for full-auto fire. What sets it apart from the DSX is the lack of a secondary tube retention ring and the use of Grade 9 titanium, which offers excellent performance without the higher cost of Grade 5 titanium. Enjoy superior quality without unnecessary expense.