Davidson Defense Left-Handed Dawnstar 10.5-inch Carbine-Gas 1:8 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit

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

This is a left-handed AR-15 upper build kit chambered in 5.56 NATO, built around a 10.5-inch government profile cryogenically treated steel barrel with a phosphate finish, a 1-8 twist rate, and a carbine-length gas system. The Black Diamond Series left-handed slick side billet aluminum upper receiver anchors the front end with a left-hand ejection port and a clean slick side exterior that omits the forward assist and dust cover from the receiver body. The carbine-length stainless steel gas tube and micro low-profile gas block at .750 complete the gas system, and the Guntec AIR-LITE Series Honeycomb 9-inch freefloat M-LOK handguard in black anodized with a full-length monolithic Picatinny top rail covers the forend. An A2 GI Birdcage flash hider at 1-2x28 closes out the muzzle end. BCG and charging handle are not included.

Key Features

• 5.56 NATO chambering, 10.5-inch government 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 gas block, .750
• Black Diamond Series left-handed slick side billet aluminum upper receiver, no forward assist, no dust cover
• Guntec AIR-LITE Series Honeycomb 9-inch freefloat M-LOK handguard, black anodized, full-length monolithic Picatinny top rail
• A2 GI Birdcage flash hider, 1-2x28 thread pitch
• Black 1-2-inch crush washer

Perfect For

• Left-handed AR-15 pistol builders sourcing a 5.56 NATO upper assembly without BCG or charging handle
• Shooters adding a left-handed 10.5-inch carbine-gas upper to an existing lower configured for left-hand operation with a left-handed BCG and charging handle on hand
• Left-handed builders who want a cryogenically treated barrel and purpose-built left-hand ejection slick side billet upper with a Guntec AIR-LITE Honeycomb M-LOK handguard in one compact upper kit

Upper Receiver and Barrel

The Black Diamond Series left-handed slick side billet aluminum upper receiver anchors the front end with a left-hand ejection port and a clean slick side exterior profile that omits both the forward assist and dust cover from the receiver body. The 10.5-inch government 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. The carbine-length stainless steel gas tube and micro low-profile gas block at .750 run a carbine-length gas system along the 10.5-inch barrel. The Guntec AIR-LITE Series Honeycomb 9-inch freefloat M-LOK handguard in black anodized surrounds the barrel and gas system along the forend with a full-length monolithic Picatinny top rail running the full length of the handguard for optics and accessory mounting, and M-LOK slots along the remaining handguard surfaces in a honeycomb pattern for accessory attachment and material reduction across the handguard body.

Muzzle Device

The A2 GI Birdcage flash hider threads onto the 1-2x28 muzzle end of the barrel. 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.