Davidson Defense Firstlight w/SBA3 Brace 8-inch 9MM Freefloat Tubular Handguard Pistol Full Build Kit

Firstlight w-SBA3 Brace 8-Inch 9mm Freefloat Tubular Handguard Pistol Full Build Kit

This is an AR-9 pistol full build kit chambered in 9mm, centered on 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 billet aluminum AR-15 pistol caliber upper receiver with a hardcoat anodized black finish anchors the front end. The 7-inch slim freefloat smooth M-LOK handguard in black covers the compact forend. An A2 Birdcage flash hider in black at 1-2x28 closes out the muzzle end. An AR-9 nitride bolt carrier group in 8620 alloy steel with an external extractor and Glock and Colt pattern magazine compatibility, and a black Mil-Spec M4 charging handle complete the upper side. The lower completion package covers a complete Mil-Spec AR-15 lower parts kit, a Mil-Spec heavy-duty AR-15 6-position buffer tube in hardcoat anodized black 7075-T6 aluminum, an AR-15 9mm carbine buffer, a standard AR-15 carbine recoil spring made in the USA, a Mil-Spec AR-15 and M16 receiver end plate, and a Mil-Spec AR-15 carbine castle nut. An SB Tactical SBA3 adjustable pistol stabilizing brace in black reinforced polymer with a flexible elastomer strap, a 5-position adjustable length, and an integrated velcro forearm strap closes out the rear end. Lower receiver 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
• Billet aluminum AR-15 pistol caliber upper receiver, hardcoat anodized black
• 7-inch slim freefloat smooth M-LOK handguard, black
• AR-9 nitride bolt carrier group, 8620 alloy steel, external extractor, Glock and Colt pattern magazine compatible
• Mil-Spec AR-15 M4 charging handle, black
• A2 Birdcage flash hider, black, 1-2x28 thread pitch, black crush washer
• Complete Mil-Spec AR-15 lower parts kit
• Mil-Spec heavy-duty AR-15 6-position buffer tube, 7075-T6 aluminum, hardcoat anodized black
• AR-15 9mm carbine buffer
• Standard AR-15 carbine recoil spring, made in the USA
• Mil-Spec AR-15 and M16 receiver end plate
• Mil-Spec AR-15 carbine castle nut
• SB Tactical SBA3 adjustable pistol stabilizing brace, black, reinforced polymer with flexible elastomer strap, 5-position adjustable, integrated velcro forearm strap, Mil-Spec carbine buffer tube compatible

Perfect For

• AR-9 pistol builders who need everything above the lower receiver for a 9mm build
• Shooters pairing this kit with an existing stripped or complete AR-9 compatible lower receiver
• Builders who want an SBA3 brace and a complete 9mm AR-9 pistol component set with a slim freefloat tubular M-LOK handguard covered in one kit

Upper Assembly

The billet aluminum AR-15 pistol caliber upper receiver with a hardcoat anodized 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. The 7-inch slim freefloat smooth M-LOK handguard in black surrounds the barrel along the compact forend with M-LOK slots along the handguard surfaces for accessory attachment.

Bolt Carrier Group and Charging Handle

The AR-9 nitride bolt carrier group is machined from 8620 alloy steel with a nitride finish and features an external extractor design specific to the AR-9 blowback platform. It is compatible with both Glock and Colt pattern magazines, giving the build flexibility in magazine selection at the lower receiver level. The black Mil-Spec M4 charging handle pairs with the BCG inside the upper receiver to complete the upper interior and finish the front end of the build.

Muzzle Device

The A2 Birdcage flash hider in black 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.

Lower Completion Components

The complete Mil-Spec AR-15 lower parts kit covers the full internal lower component group, including the fire control group, magazine catch, bolt catch, and all associated pins and springs. The Mil-Spec heavy-duty AR-15 6-position buffer tube in hardcoat anodized black 7075-T6 aluminum, AR-15 9mm carbine buffer, and standard AR-15 carbine recoil spring made in the USA form the buffer system at the rear of the lower. The Mil-Spec AR-15 and M16 receiver end plate and Mil-Spec AR-15 carbine castle nut lock the buffer tube down cleanly at the rear of the lower receiver. The SB Tactical SBA3 adjustable pistol stabilizing brace in black reinforced polymer with a flexible elastomer strap fits over the Mil-Spec 6-position buffer tube and closes out the rear end of the build with a 5-position adjustable length and an integrated velcro forearm strap for arm support.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.