Davidson Defense 9mm AR-9 Quad-Rail SBR Ready Pistol Full Build Kit + Witt Machine Naughty 9

9mm AR-9 Quad-Rail SBR Ready Pistol Full Build Kit + Witt Machine Naughty 9

This is a complete 9mm AR-9 build kit with everything except the lower receiver. You get a billet upper receiver, 6-inch nitride barrel, free-float quad-rail handguard, bolt carrier group, charging handle, lower parts kit, buffer system components, and the Naughty 9 suppressor included. It's SBR ready, which means it ships without a brace so you can configure it based on your specific setup needs.

Key Features

• Billet aluminum upper receiver with integrated Picatinny rail
• 6-inch 4150 CrMoV nitride barrel with 1:10 twist rate and 1/2x28 threading
• 7-inch free-float quad-rail handguard in aircraft-grade aluminum
• Complete 9mm bolt carrier group with external extractor and nitride finish
• Mil-spec lower parts kit with AR-15 compatible components
• 6-position carbine buffer tube with standard recoil spring and 9mm buffer
• Naughty 9 suppressor included, 4-inch ultra-compact design in 416 stainless steel
• SBR ready configuration
• Glock and Colt pattern magazine compatibility

Perfect For

• Builders creating a suppressed 9mm pistol platform
• Shooters wanting an all-in-one kit with suppressor included
• Users planning to configure their own brace or stock setup
• Those seeking a compact, modular 9mm system
• Suppressor-ready builds in states allowing NFA items

SBR Ready Configuration

This kit ships without a brace because it's designed for customers who want to select their own final configuration. You'll have the flexibility to choose between a pistol brace, a registered stock if you're pursuing SBR status, or keeping it as a pistol depending on your needs and local laws. The kit includes all the upper and lower components needed to complete a functional firearm once you add your choice of brace or stock and the serialized lower receiver.

Naughty 9 Suppressor Integration

The included Naughty 9 suppressor is a 4-inch ultra-compact unit in 416 stainless steel with graphite black Cerakote finish. It threads directly onto the barrel's 1/2x28 muzzle with secure mounting compatibility. The suppressor design prioritizes compact size without sacrificing sound reduction, making it ideal for short-barreled configurations. The free-float quad-rail handguard provides ample mounting space for optics and accessories while maintaining the suppressor-ready setup.

Direct Blowback Operation and Reliability

The 9mm direct blowback system uses the included bolt carrier group with an external extractor to cycle the action. This operating method is straightforward and reliable for 9mm pistol caliber platforms. The system works with both Glock and Colt pattern magazines, giving you flexibility in ammunition feeding. The 6-inch barrel length paired with the 1:10 twist rate ensures consistent bullet stabilization across standard and subsonic 9mm loads.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Ships without a brace. Do not attach a stock unless compliant with applicable laws. Verify compatibility before use. Ensure secure mounting before operation. Use only in accordance with applicable laws.