Davidson Defense Odyssey 10.5-inch Carbine-Gas 1:8 556 AR-15 Freefloat ML Handguard Pistol Upper Build Kit

Odyssey 10.5-Inch Carbine-Gas 1-8 5.56 NATO AR-15 Freefloat M-LOK Handguard Pistol Upper Build Kit

This is an AR-15 upper build kit chambered in 5.56 NATO, built around a 10.5-inch Sandel profile cryogenically treated steel barrel with a phosphate finish and a 1-8 twist rate. The 7075-T6 aluminum upper receiver with a black anodized finish, M4 feed ramps, a Mil-Spec forward assist, and a .223 and 5.56 ejection port door assembly with rod and spring anchors the front end. The carbine-length stainless steel gas tube and micro low-profile steel gas block at .750 complete the gas system, and the 10-inch freefloat tubular aluminum M-LOK handguard with a suppressor ready profile and a 1.77-inch internal diameter covers the forend. An A2 GI Birdcage flash hider in 1-2x28 closes out the muzzle end. BCG and charging handle are not included.

Key Features

• 5.56 NATO chambering, 10.5-inch Sandel profile cryogenically treated steel barrel, phosphate finish
• 1-8 twist rate, 1-2x28 thread pitch
• Carbine-length gas system with carbine-length stainless steel gas tube
• Micro low-profile steel gas block, .750
• 7075-T6 aluminum upper receiver, black anodized, M4 feed ramps
• Mil-Spec forward assist
• AR-15 .223 and 5.56 ejection port door assembly with rod and spring
• 10-inch freefloat tubular aluminum M-LOK handguard, suppressor ready profile, 1.77-inch internal diameter
• A2 GI Birdcage flash hider, 1-2x28 thread pitch
• Black 1-2-inch crush washer

Perfect For

• AR-15 pistol builders sourcing a 5.56 NATO upper assembly without BCG or charging handle
• Shooters adding a 10.5-inch carbine-gas upper to an existing lower with a BCG and charging handle on hand
• Builders who want a cryogenically treated barrel and a suppressor ready tubular M-LOK handguard in one compact pistol-length upper kit

Upper Receiver and Barrel

The 7075-T6 aluminum upper receiver with a black anodized finish and M4 feed ramps forms the core of the front end, with a Mil-Spec forward assist and a .223 and 5.56 ejection port door assembly with rod and spring built in. The 10.5-inch Sandel profile cryogenically treated steel barrel brings a phosphate finish and a 1-8 twist rate to the 5.56 NATO chamber, threaded at 1-2x28. The cryogenic treatment is applied to the barrel steel as a process that addresses stress and grain structure within the metal, and the Sandel profile gives the barrel a distinctive exterior shape that differs from standard government or HBAR profiles. The carbine-length stainless steel gas tube and micro low-profile steel gas block at .750 run a carbine-length gas system along the 10.5-inch barrel. The 10-inch freefloat tubular aluminum M-LOK handguard surrounds the barrel and gas system along the forend with a suppressor ready profile that features a 1.77-inch internal diameter, giving the handguard enough internal clearance to accommodate a suppressor mounted at the muzzle end of the barrel underneath the handguard when used with a compatible short suppressor setup. M-LOK slots along the handguard body provide accessory attachment across the full 10-inch length.

Muzzle Device

The A2 GI Birdcage flash hider threads onto the 1-2x28 muzzle end of the barrel and closes out the front of this pistol-length upper with a standard proven flash hider pattern. The included black 1-2-inch 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.