Heresy Design 16.3in 9mm AUG Conversion Kit For NATO Stock Black. 1'' 9MM Conversion Kit is the ultimate upgrade for Steyr AUG A3 M1 NATO Stock owners looking for caliber conversions. This conversion kit allows you to seamlessly switch calibers and shoot with minimal gas blowback. At the core of the Heresy Design 9MM Conversion Kit is a 16.1'' barrel equipped with a 3-lug suppressor mount and 1/228 threaded barrel with thread protector. This conversion kit uses a direct blowback operating system. Shipping with the barrel carrier group and 9MM magazine installation is quick and straightforward requiring no modifications to your firearm. In under 90 seconds you are ready to hit the range. Specifications for Heresy Design 16.3in 9mm AUG Conversion Kit For NATO Stock: Manufacturer: Heresy Design Color: Black Gun Make: Steyr Gun Model: Steyr AUG Caliber: 9mm Luger Magazine Capacity: 30 Round Features of Heresy Design 16.3in 9mm AUG Conversion Kit For NATO Stock Threaded 1/2x28 with integrated 3-lug suppressor mount Seamless install without any modifications needed Designed for easy replacement and maintenance Isonite coated wear parts Anodized Aluminum quad rails Limited lifetime warranty Package Contents: Heresy Design 16.3in 9mm AUG Conversion Kit For NATO Stock Manual Sticker What firearm models does the manufacturer say Heresy Design 16.3in 9mm AUG Conversion Kit For NATO Stock is compatible with? The manufacturer suggests that Heresy Design 16.3in 9mm AUG Conversion Kit For NATO Stock is compatible with Steyr AUGHeresy Design HBA16D-N: 16.3in 9mm AUG Conversion Kit For NATO Stock Black