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

Firstlight w-Magpul BTR 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. A 9mm pass-through flash can in black at 1-2x28 closes out the muzzle end. A 9mm 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 with Mil-Spec A2 style pistol grip in black, 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 an AR-15 carbine castle nut. A Magpul BTR pistol brace in black polymer 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
• 9mm nitride bolt carrier group, 8620 alloy steel, external extractor, Glock and Colt pattern magazine compatible
• Mil-Spec AR-15 M4 charging handle, black
• 9mm pass-through flash can, black, 1-2x28 thread pitch, black crush washer
• Complete Mil-Spec AR-15 lower parts kit with Mil-Spec A2 style pistol grip, black
• 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
• AR-15 carbine castle nut
• Magpul BTR pistol brace, black, polymer, Mil-Spec 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 a Magpul BTR brace and a complete 9mm AR-9 pistol component set with a slim freefloat tubular M-LOK handguard and pass-through flash can 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 9mm 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 9mm pass-through flash can 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, with a Mil-Spec A2 style pistol grip in black covering the grip interface. 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 AR-15 carbine castle nut lock the buffer tube down cleanly at the rear of the lower receiver. The Magpul BTR pistol brace in black polymer fits directly over the Mil-Spec 6-position buffer tube and closes out the rear end of the build with a well-regarded Magpul brace design that pairs cleanly with the included buffer tube.

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