Engineered to perfection and built for performance, the Heresy DesignA(R) 16.1" 9MM AUGA(R) Conversion Kit is designed to be compatible with the SteyrA(R) AUGA(R) A3M1 using the NATO or a standard stock. This quick change barrel system allows AUGA(R) 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 AUGA(R) NATO Stock Easy Install without Modification Direct Blowback Operating System Anodized Aluminum Quad Rails Mfg: Heresy Design Inc.