Davidson Defense Ronin Competition 8-inch 9MM Freefloat M-Lok Handguard Pistol Upper Build Kit

Ronin Competition 8-Inch 9mm Freefloat M-LOK Handguard Pistol Upper Build Kit

This is an AR-9 upper build kit chambered in 9mm, built around an 8.3-inch medium profile steel barrel with a nitride finish, a 1-10 twist rate, and a direct blowback system with no gas tube or gas block. The 6061 billet pistol caliber AR-15 upper receiver with a black finish anchors the front end. The ACE-20 Series 7-inch freefloat M-LOK handguard in black covers the compact forend. An A2 GI Birdcage flash hider at 1-2x28 closes out the muzzle end. BCG and charging handle are not included.

Key Features

• 9mm chambering, 8.3-inch medium profile steel barrel, nitride finish
• 1-10 twist rate, 1-2x28 thread pitch
• Direct blowback operation, no gas tube or gas block
• 6061 billet pistol caliber AR-15 upper receiver, black
• ACE-20 Series 7-inch freefloat M-LOK handguard, black
• A2 GI Birdcage flash hider, 1-2x28 thread pitch, black crush washer

Perfect For

• AR-9 pistol builders sourcing a 9mm upper assembly without BCG or charging handle
• Shooters adding an 8.3-inch 9mm upper to an existing lower with a compatible 9mm blowback BCG and charging handle on hand
• Builders who want a 6061 billet pistol caliber upper receiver and ACE-20 Series freefloat M-LOK handguard in one compact 9mm upper kit

Upper Receiver and Barrel

The 6061 billet pistol caliber AR-15 upper receiver with a black finish forms the core of the front end for the AR-9 platform. The 8.3-inch medium profile steel barrel brings a nitride finish and a 1-10 twist rate to the 9mm chamber, threaded at 1-2x28. This upper operates on a direct blowback system, meaning there is no gas tube or gas block present or required on this upper. The ACE-20 Series 7-inch freefloat M-LOK handguard in black surrounds the barrel along the compact forend with M-LOK slots across the handguard surfaces for accessory attachment and optics mounting.

Muzzle Device

The A2 GI Birdcage flash hider threads onto the 1-2x28 muzzle end of the barrel. The included black crush washer seats at the barrel shoulder and completes the muzzle hardware for this kit.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. BCG and charging handle are not included.