Davidson Defense Ronin Competition w/Gauntlet Arms Brace 4.5-inch 1:10 9MM AR-9 Freefloat M-Lok Handguard Pistol Full Build Kit

Davidson Defense Ronin Competition 9MM AR-9 Full Build Kit with Gauntlet Arms Brace

The Davidson Defense Ronin Competition delivers a complete 9MM AR-9 pistol platform with precision billet construction and dual magazine compatibility. Featuring a 4.5 inch barrel with 1 in 10 twist rate constructed from 4150 Chrome Moly Vanadium steel with nitride finish, this kit balances compact dimensions with reliable 9MM performance. The medium profile barrel includes 1/2x36 threads paired with an included 9MM flash hider. The upper receiver is a USA made Black Diamond Series AR-15 slick side billet model crafted from 6061-T6 aluminum with Type III hard coat anodizing for exceptional durability. A freefloat M-Lok handguard facilitates modular customization for various accessory attachments. The kit includes a polymer Gauntlet Arms brace for stabilization and an AR-15 M4 charging handle with mil-spec quality. The 9MM nitride bolt carrier group is compatible with both Glock and Colt magazines, ensuring versatility in ammunition feeding options. This full build kit delivers coordinated components for assembling a complete AR-9 pistol configuration.

Key Features

• 4.5 inch 4150 Chrome Moly Vanadium barrel with nitride finish and 1 in 10 twist
• USA made Black Diamond Series slick side billet upper from 6061-T6 aluminum with Type III hard coat anodizing
• Freefloat M-Lok handguard with Gauntlet Arms polymer brace
• 9MM nitride BCG compatible with Glock and Colt magazines
• AR-15 M4 charging handle with 9MM flash hider included

Perfect For

• Builders seeking complete kits with precision billet construction
• Shooters needing dual magazine compatibility with Glock and Colt systems
• Users prioritizing Type III anodizing for maximum durability
• Builds requiring coordinated upper and lower pistol components

Black Diamond Series Billet Upper

The USA made Black Diamond Series slick side billet upper receiver is machined from solid 6061-T6 aluminum stock for tight tolerances and enhanced precision. Slick side design eliminates the forward assist for clean lines, reduced weight and streamlined appearance. Type III hard coat anodizing creates an exceptionally durable surface finish that resists wear and corrosion better than standard Type II anodizing. The combination of billet machining and premium anodizing delivers a robust upper suitable for demanding competitive and training environments.

Dual Magazine Compatibility

The 9MM nitride bolt carrier group functions with both Glock pattern and Colt pattern magazines, providing flexibility in magazine selection based on availability, cost or personal preference. This dual compatibility eliminates commitment to a single magazine ecosystem during build planning. Shooters can take advantage of either system without modification or adapter requirements. The BCG design accommodates dimensional differences between magazine types seamlessly for reliable feeding.

Freefloat M-Lok Customization

The freefloat M-Lok handguard isolates the barrel from external contact, supporting accuracy by preventing shifts in point of impact from grip pressure or mounted accessories. M-Lok slots provide direct mounting points for lights, grips and other devices without bulky rail sections. This modular approach allows customization based on specific use requirements while maintaining a clean profile when accessories are removed. The freefloat design also aids heat dissipation during extended shooting sessions.

Complete Kit Integration

This full build kit includes upper receiver, barrel, handguard, bolt carrier group, charging handle, brace and muzzle device as a coordinated package. Component compatibility is ensured through Davidson Defense quality control and engineering. The kit approach eliminates sourcing individual parts from multiple suppliers and removes guesswork about component matching. Builders receive everything needed for complete AR-9 pistol upper and lower assembly in a single purchase.

Follow safe handling and manufacturer instructions

Ensure compliance with all applicable laws

Verify lower receiver magazine compatibility with selected system

Confirm ammunition type is 9MM before use