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

Left-Handed Aegis Lightweight 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 with a black anodized finish 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 steel gas block at .750 O.D. complete the gas system, and the 10-inch ultra-lightweight minimalist freefloat M-LOK handguard with a partial 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 steel gas block, .750 O.D.
• Black Diamond Series left-handed slick side billet aluminum upper receiver, black anodized, no forward assist, no dust cover
• 10-inch ultra-lightweight minimalist freefloat M-LOK handguard, partial Picatinny top rail, no anti-rotation tabs
• 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 purpose-built left-hand ejection slick side billet upper with a cryogenically treated barrel and ultra-lightweight minimalist M-LOK handguard in one compact upper kit

Upper Receiver and Barrel

The Black Diamond Series left-handed slick side billet aluminum upper receiver with a black anodized finish 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 steel gas block at .750 O.D. run a carbine-length gas system along the 10.5-inch barrel. The 10-inch ultra-lightweight minimalist freefloat M-LOK handguard surrounds the barrel and gas system along the forend with a partial Picatinny top rail running along the top of the handguard and M-LOK slots along the remaining handguard body for accessory attachment. The handguard does not include anti-rotation tabs, a design characteristic of this specific unit.

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.