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

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

This is a complete AR-15 upper 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. A complete AR-15 bolt carrier group made in the USA compatible with 5.56 NATO, .223 Remington, .300 AAC Blackout, and .350 Legend, and a Mil-Spec M4 charging handle complete the upper component set.

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
• Complete AR-15 bolt carrier group, made in the USA, 5.56, .223, .300, .350 compatible
• Mil-Spec AR-15 M4 charging handle
• A2 GI Birdcage flash hider, 1-2x28 thread pitch
• Black 1-2-inch crush washer

Perfect For

• AR-15 pistol builders pairing a complete 5.56 NATO upper with an existing lower
• Shooters adding a 10.5-inch carbine-gas upper to an AR-15 lower they already own
• Builders who want a BCG and charging handle included with a cryogenically treated barrel and suppressor ready tubular M-LOK handguard in one complete pistol-length upper assembly

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 featuring a 1.77-inch internal diameter that provides clearance for a compatible short suppressor mounted at the muzzle end of the barrel underneath the handguard. M-LOK slots along the handguard body provide accessory attachment across the full 10-inch length.

Bolt Carrier Group and Charging Handle

The complete AR-15 bolt carrier group is made in the USA and compatible with 5.56 NATO, .223 Remington, .300 AAC Blackout, and .350 Legend, making it a versatile and well-suited choice for this chambering. The Mil-Spec M4 charging handle pairs with the BCG inside the upper receiver to complete the upper interior. These two components complete the upper component set alongside the upper assembly, barrel, and handguard.

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 upper.

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