Davidson Defense Atriox 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build

Davidson Defense Atriox AR-15 Complete Upper - 11.5-inch 5.56 NATO Carbine-Gas 1:7 Freefloat M-Lok Handguard

The Davidson Defense Atriox is an AR-15 complete upper chambered in 5.56 NATO with an 11.5-inch government profile barrel. The complete upper includes the upper receiver, barrel, handguard, bolt carrier group, and charging handle. A bolt carrier group and charging handle are included.

Key Features

• 11.5-inch 4150 CrMoV steel government profile barrel
• Phosphate barrel finish
• 1:7 twist rate
• 1-in-2x28 thread pitch
• Carbine-length gas system with .750 O.D. steel micro low-profile gas block
• 7075-T6 aluminum upper receiver with M4 feed ramps, anodized finish
• Freefloat M-Lok handguard in 6061-T6 aluminum
• Complete bolt carrier group with 9310 alloy steel bolt head and 8620 alloy steel body, nitride finish
• Mil-spec M4 charging handle
• GI birdcage flash hider with manganese phosphate finish, 1-in-2x28 thread pitch

Perfect For

• AR-15 pistol builders sourcing a complete upper in 5.56 NATO
• Builders pairing an 11.5-inch carbine-gas upper with a stripped lower receiver
• Shooters running a freefloat M-Lok handguard configuration
• Builders looking for a complete upper with bolt carrier group included

Barrel and Gas System

The 11.5-inch government profile barrel is 4150 CrMoV steel with a phosphate finish and a 1:7 twist rate. The barrel handles the 5.56 NATO chamber and provides the threaded muzzle end for the included GI birdcage flash hider in manganese phosphate finish at a 1-in-2x28 thread pitch. The carbine-length gas system uses a .750 O.D. steel micro low-profile gas block, which sits beneath the handguard and keeps the forend profile clean and unobstructed.

Upper Receiver and Handguard

The upper receiver is 7075-T6 aluminum with M4 feed ramps and an anodized finish. M4 feed ramps support reliable cartridge feeding from the magazine into the chamber. The freefloat M-Lok handguard is 6061-T6 aluminum in black, giving the build a clean forend with M-Lok accessory slots for lights, grips, and other attachments. The handguard length matches the 11.5-inch barrel, with the muzzle device providing clearance beyond the handguard.

Bolt Carrier Group and Charging Handle

The included bolt carrier group is a complete AR-15 unit with a 9310 alloy steel bolt head and an 8620 alloy steel body, finished in nitride. It is compatible with 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend configurations. The mil-spec M4 charging handle completes the upper component set.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.