Davidson Defense Atriox w/SBA3 Brace 10.5-inch 1:10 9MM AR-9 Freefloat M-Lok Handguard Pistol Full Build Kit

Davidson Defense Atriox SBA3 Brace 10.5-inch 9mm AR-9 M-Lok Full Build Kit

The Davidson Defense Atriox is a 9mm AR-9 Full Build Kit built around a compact pistol platform. The kit centers on a Bear Creek 10.5-inch 9mm barrel with a 1:10 twist rate, black nitride finish, and 1/2x36 thread pitch, paired with a 9mm Flash Hider A2 birdcage muzzle device. The upper receiver is 7075-T6 aluminum with an anodized finish, and the freefloat handguard is 6061-T6 aluminum in M-Lok format. A 9mm nitride bolt carrier group in 8620 alloy steel and a Mil-Spec AR-15 M4 charging handle round out the upper side. The lower completion hardware includes a Mil-Spec heavy-duty 6-position buffer tube, a 9mm carbine buffer at 5.5 oz, a recoil spring, an AR-15 M16 Mil-Spec receiver end plate, and a castle nut. The SB Tactical SBA3 adjustable pistol stabilizing brace is included. Lower receiver not included.

Key Features

• Bear Creek 10.5-inch 9mm barrel, 1:10 twist, black nitride finish, 1/2x36 thread pitch
• 9mm Flash Hider A2 birdcage muzzle device, 1/2x36
• 7075-T6 aluminum upper receiver, anodized finish
• Freefloat M-Lok handguard, 6061-T6 aluminum, black
• 9mm nitride bolt carrier group, 8620 alloy steel
• AR-15 M4 Mil-Spec charging handle
• Mil-Spec heavy-duty 6-position buffer tube
• 9mm carbine buffer, 5.5 oz
• Recoil spring
• AR-15 M16 Mil-Spec receiver end plate
• SB Tactical SBA3 adjustable pistol stabilizing brace

Perfect For

• Builders sourcing a complete 9mm AR-9 pistol kit and pairing it with their own lower receiver
• Shooters building a compact 9mm pistol platform with an adjustable brace already included
• AR-9 builders who want a Bear Creek barrel and SB Tactical brace in one kit

Bear Creek Barrel and Muzzle Device

The Bear Creek 10.5-inch barrel is chambered in 9mm with a 1:10 twist rate and a black nitride finish. The barrel thread pitch is 1/2x36, which matches the included 9mm Flash Hider A2 birdcage muzzle device. At 10.5 inches, this barrel keeps the overall footprint compact while maintaining the thread standard common to 9mm AR platforms.

Upper Receiver and Handguard

The upper receiver is 7075-T6 aluminum with an anodized finish, a material and finish combination standard to AR-15 pattern uppers. The freefloat M-Lok handguard is 6061-T6 aluminum in black, providing a lightweight front end with M-Lok accessory slots along the rail surface. These two components define the exterior structure of the upper.

Bolt Carrier Group and Charging Handle

The 9mm nitride bolt carrier group is constructed from 8620 alloy steel with a nitride finish, and it is spec-matched to the 9mm platform in this kit. A Mil-Spec AR-15 M4 charging handle is included to complete the upper component set. Together these cover the internal upper function components beyond the barrel and handguard.

Buffer System and Brace

The buffer system in this kit includes a Mil-Spec heavy-duty 6-position carbine buffer tube, a 9mm carbine buffer weighing 5.5 oz, and a recoil spring. The AR-15 M16 Mil-Spec receiver end plate is included as part of the rear hardware. The SB Tactical SBA3 adjustable pistol stabilizing brace rounds out the kit, providing an adjustable rear interface for the pistol platform.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify local and state laws regarding pistol brace use and classification.