Engineered to perfection and built for performance, the Heresy Design® 16.1" 9MM AUG® Conversion Kit is designed to be compatible with the Steyr® AUG® A3M1 using the NATO or a standard stock. This quick change barrel system allows AUG® owners to easily switch calibers and shoot suppressed with minimal gas blowback. The 9MM 16.1"" Conversion Kit ships with a barrel assembly, carrier, and magazine for NATO or standard stock. FEATURES: 3 Lug Suppressor Mount with 1/2x28 Thread Option Compatible with AUG® NATO Stock Easy Install without Modification Direct Blowback Operating System Anodized Aluminum Quad Rails Standard AR15 Wear parts Isonite coated wear parts Limited Lifetime Warranty Not compatible with Steyr AUGA3 SA Models