Davidson Defense IX 4.5-inch 1:10 9MM AR-9 Freefloat M-Lok Handguard Pistol Upper Build Kit

Davidson Defense IX | 9MM | 4.5" Pistol Upper Build Kit | 1:10 Twist | M-Lok Handguard

The Davidson Defense IX is a 4.5-inch 9MM pistol upper build kit offering a robust solution for AR-9 platform builders. Constructed with a 4.5-inch medium profile barrel made from 4150 Chrome Moly Vanadium with a nitride finish, this barrel ensures durability and performance. The barrel twist rate is set at 1:10, optimized for 9mm (9x19) ammunition. The upper receiver is crafted from 6061-T6 billet aluminum with a Type III hard coat anodized finish, providing strength while maintaining lightweight characteristics. The 4-inch freefloat M-Lok handguard delivers versatility for attachments and accessories. It is equipped with a 9MM A2 birdcage flash hider, threaded at 1/2x36, ensuring reliable muzzle control.

Key Features

• 4.5" medium profile barrel in 9MM with nitride finish and 1:10 twist rate
• 4150 Chrome Moly Vanadium construction for durability and performance
• 6061-T6 billet aluminum upper receiver with Type III hard coat anodized finish
• 4-inch freefloat M-Lok handguard for versatile accessory attachment
• 9MM A2 birdcage flash hider with 1/2x36 thread pitch
• Optimized for 9mm (9x19) ammunition
• Designed for pistol-caliber builds with blowback operation
• Available in multiple configuration options

Perfect For

• Compact 9MM AR-9 pistol builds for home defense and range use
• Shooters seeking an ultra-compact pistol-caliber platform
• Close-quarters applications requiring maximum maneuverability
• Builders looking for a quality 9MM upper assembly with freefloat handguard

Nitride Medium Profile Barrel

The 4.5-inch medium profile barrel is made from 4150 Chrome Moly Vanadium with a nitride finish for exceptional durability and corrosion resistance. The 1:10 twist rate is optimized for 9mm (9x19) ammunition stabilization in an ultra-compact configuration.

6061-T6 Billet Aluminum Upper Receiver

The upper receiver is crafted from 6061-T6 billet aluminum with a Type III hard coat anodized finish, providing strength while maintaining lightweight characteristics and compatibility with 9MM pistol-caliber components.

Freefloat M-Lok Handguard

The 4-inch freefloat M-Lok handguard delivers versatility for attachments and accessories with multiple mounting points. The freefloat design supports consistent accuracy and improved heat dissipation.

9MM A2 Birdcage Flash Hider

The 9MM A2 birdcage flash hider is threaded at 1/2x36 for secure attachment, ensuring reliable muzzle control and effective flash suppression for 9MM pistol-caliber applications.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify magazine compatibility with your specific configuration.