Aug Conversn Kit Nato Stock 9Mm 16.1'' Bbl & Carrier Grp Blk

The Heresy Design 9mm AUG conversion kit puts a whole new caliber option in the hands of AUG A3M1 owners without the guesswork or gunsmith work. This 16.1" barrel and carrier group kit is built for shooters who want to run their modern sporting rifle suppressed or simply explore what 9mm performance looks like downrange. It's a quick-change system that respects your investment in your primary platform—swap barrels and carriers to transition between calibers, and you're ready to shoot.

Built around a direct blowback operating system, the kit is engineered to handle suppressed fire with minimal gas blowback in your face—a real advantage when you're running cans. The barrel features a 3-lug suppressor mount with 1/2x28 threading, so mounting a can is straightforward if you run one. The anodized aluminum quad rails give you modern accessory real estate, and the system uses standard AR15 wear parts where applicable, keeping replacements simple and affordable down the road. Isonite coating on critical wear surfaces adds durability without fuss.

Compatibility is straightforward: this kit works with Steyr AUG A3M1 rifles using NATO or standard stocks. It does not fit the AUGA3 SA models, so verify your rifle before ordering. Everything you need ships in the box—barrel assembly, carrier group, and magazine—so you can start shooting as soon as it arrives.

Key Features

• 16.1" 9mm barrel with quick-change capability for easy caliber swaps
• 3-lug suppressor mount with 1/2x28 threading for can-ready setup
• Direct blowback operating system optimized for suppressed fire and reduced gas blowback
• Anodized aluminum quad rails for optics, lights, and accessories
• Isonite-coated wear parts for extended service life
• Standard AR15 compatible wear parts for simple maintenance and replacement
• Includes barrel assembly, carrier group, and magazine

Specifications

Frequently Asked Questions

Will this conversion kit work with my AUG?

This 9mm conversion kit is compatible with the Steyr AUG A3M1 when paired with either a NATO or standard stock. It will not work with AUGA3 SA models, so double-check your rifle's model before ordering.

Can I run this kit with a suppressor?

Yes. The barrel is fitted with a 3-lug suppressor mount with 1/2x28 threading, making it suppressor-ready out of the box. The direct blowback design also minimizes gas blowback, which is a practical advantage when shooting suppressed.

What comes in the box?

The kit ships with the barrel assembly, carrier group, and a magazine—everything needed to convert your AUG to 9mm and start shooting.

Are replacement parts easy to find?

The kit uses standard AR15 wear parts, which means replacements are widely available and relatively inexpensive when you need them.