Davidson Defense Left-Handed Aegis Lightweight w/SBA3 Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit

Left-Handed Aegis Lightweight w-SBA3 Brace 14.5-Inch Carbine-Gas 1-7 5.56 NATO AR-15 Freefloat M-LOK Handguard Pistol Full Build Kit

This is a left-handed AR-15 pistol full build kit chambered in 5.56 NATO, centered on a 14.5-inch M4 profile 4150 Chrome Moly Vanadium steel barrel with a Parkerized finish, a 1-7 twist rate, and a carbine-length gas system. The left-handed Black Diamond Series 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 the forward assist from the receiver body. The carbine-length stainless steel gas tube and micro low-profile steel gas block at .750 complete the gas system, and the 12-inch ultra-lightweight freefloat M-LOK handguard in black with a partial Picatinny top rail covers the forend. An A2 GI Birdcage flash hider at 1-2x28 closes out the muzzle end. A Davidson Defense premium left-handed M16 nitride bolt carrier group and a Mil-Spec M4 charging handle complete the upper side. The lower completion package covers a complete Mil-Spec AR-15 lower parts kit, a Mil-Spec heavy-duty 6-position buffer tube, a standard AR-15 carbine buffer at 3 oz., a standard AR-15 carbine recoil spring made in the USA, a Mil-Spec AR-15 M16 receiver end plate, and a Mil-Spec AR-15 carbine castle nut. An SB Tactical SBA3 adjustable pistol stabilizing brace in black closes out the rear end. Lower receiver not included.

Key Features

• 5.56 NATO chambering, 14.5-inch M4 profile 4150 Chrome Moly Vanadium steel barrel, Parkerized finish
• 1-7 twist rate, 1-2x28 thread pitch
• Carbine-length gas system with carbine-length stainless steel gas tube
• Micro low-profile steel gas block, .750
• Left-handed Black Diamond Series slick side billet aluminum upper receiver
• 12-inch ultra-lightweight freefloat M-LOK handguard, black, partial Picatinny top rail, no anti-rotation tabs
• Davidson Defense premium left-handed M16 bolt carrier group, nitride finish
• Mil-Spec AR-15 M4 charging handle
• A2 GI Birdcage flash hider, 1-2x28 thread pitch
• Black steel crush washer
• Complete Mil-Spec AR-15 lower parts kit
• Mil-Spec heavy-duty 6-position buffer tube
• Standard AR-15 carbine buffer, 3 oz.
• Standard AR-15 carbine recoil spring, made in the USA
• Mil-Spec AR-15 M16 receiver end plate
• Mil-Spec AR-15 carbine castle nut
• SB Tactical SBA3 adjustable pistol stabilizing brace, black

Perfect For

• Left-handed AR-15 pistol builders who need everything above the lower receiver for a 5.56 NATO build
• Shooters pairing this kit with an existing stripped or complete AR-15 lower receiver configured for left-hand operation
• Left-handed builders who want an SBA3 brace and a complete 5.56 pistol component set with a purpose-built left-hand ejection slick side billet upper covered in one kit

Upper Assembly

The left-handed Black Diamond Series 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 the forward assist from the receiver body. The 14.5-inch M4 profile 4150 Chrome Moly Vanadium steel barrel brings a Parkerized finish and a 1-7 twist rate to the 5.56 NATO chamber, threaded at 1-2x28. The carbine-length stainless steel gas tube and micro low-profile steel gas block at .750 run a carbine-length gas system along the 14.5-inch barrel. The 12-inch ultra-lightweight freefloat M-LOK handguard in black 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.

Bolt Carrier Group and Charging Handle

The Davidson Defense premium left-handed M16 bolt carrier group carries a nitride finish and is a purpose-built left-hand BCG designed to function with the left-handed upper receiver and eject cases from the left side of the build. The Mil-Spec M4 charging handle pairs with the BCG inside the upper receiver to complete the upper interior and finish the front end of the build.

Muzzle Device

The A2 GI Birdcage flash hider threads onto the 1-2x28 muzzle end of the barrel. The included black steel crush washer seats at the barrel shoulder and completes the muzzle hardware for this kit.

Lower Completion Components

The complete Mil-Spec AR-15 lower parts kit covers the full internal lower component group, including the fire control group, magazine catch, bolt catch, and all associated pins and springs. The Mil-Spec heavy-duty 6-position buffer tube, standard AR-15 carbine buffer at 3 oz., and standard AR-15 carbine recoil spring made in the USA form the buffer system at the rear of the lower. The Mil-Spec AR-15 M16 receiver end plate and Mil-Spec AR-15 carbine castle nut lock the buffer tube down cleanly at the rear of the lower receiver. The SB Tactical SBA3 adjustable pistol stabilizing brace in black fits over the Mil-Spec 6-position buffer tube and closes out the rear end of the build with an adjustable length of pull and a well-regarded brace design trusted across the AR pistol platform.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.