The Davidson Defense IX is a 4.5-inch 9MM pistol complete upper build engineered for versatility and performance. Chambered in 9MM, this upper features a 4.5-inch barrel constructed from 4150 Chrome Moly Vanadium steel with a nitride finish for durability. The medium profile barrel has a 1:10 twist rate, optimized for stability and accuracy. It includes a 9MM A2 birdcage flash hider with a 1/2x36 thread pitch. The upper is fitted with a robust AR-15 billet upper receiver made from 6061-T6 aluminum with a Type III hard coat anodized finish. The freefloat M-Lok handguard allows for modular attachment of accessories while maintaining a lightweight profile. A nitride bolt carrier group ensures reliable operation, and a mil-spec quality M4 charging handle facilitates smooth cycling.
The 4.5-inch medium profile barrel is constructed from 4150 Chrome Moly Vanadium steel with a nitride finish for exceptional durability and corrosion resistance. The 1:10 twist rate is optimized for stability and accuracy with 9MM ammunition in an ultra-compact configuration.
The AR-15 billet upper receiver is made from 6061-T6 aluminum with a Type III hard coat anodized finish, providing a robust foundation and compatibility with 9MM pistol-caliber components.
The freefloat M-Lok handguard allows for modular attachment of accessories while maintaining a lightweight profile. The freefloat design supports consistent accuracy and improved heat dissipation.
The nitride bolt carrier group ensures reliable operation with 9MM pistol-caliber ammunition, providing consistent cycling and long-term durability.
Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify magazine compatibility with your specific configuration.
Caliber: 9mm (9x19)
Barrel: AR-15 4.5" 9MM, 1:10T, 4150 CrMoV, Nitride, Medium Profile Barrel Thread Pitch: 1/2x36
Barrel Length: 4.5-inch
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Finish: Nitride
Barrel Profile: Medium
Barrel Twist Rate: 1:10T
Muzzle Device: 9mm Flash Hider A2 Bird Cage 1/2-36
Muzzle Thread Pitch: 1/2x36
Bolt Carrier: 9MM Nitride Bolt Carrier Group
Bolt Carrier Material: 8620 Alloy Steel
Bolt Carrier Finish: Nitride
Upper Receiver: AR-15 Billet Upper Receiver for Pistol Calibers
Upper Receiver Material: Billet 6061-T6 Aluminum
Upper Receiver Finish: Type III Hardcoat Anodized
Handguard Style: M-LOK Freefloat
Charging Handle: AR-15 M4 Charging Handle Mil-Spec Quality
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