Davidson Defemse Aegis Lightweight w/Gauntlet Arms Brace 11.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit

Aegis Lightweight w-Gauntlet Arms Brace 11.5-Inch Carbine-Gas 1-7 5.56 NATO AR-15 Freefloat M-LOK Handguard Pistol Full Build Kit

This is an AR-15 pistol full build kit chambered in 5.56 NATO, centered on an 11.5-inch government profile 4150 CrMoV steel barrel with a phosphate finish and a 1-7 twist rate. The 7075-T6 aluminum upper receiver with an anodized finish and M4 feed ramps anchors the front end, with a standard forward assist assembly and an AR-15 ejection port door assembly as part of the receiver. The 10-inch ultra-lightweight minimalist freefloat M-LOK handguard in aircraft-grade 6061-T6 aluminum keeps the front end trim and light, with a partial top Picatinny rail for optics and accessories where they matter most. A complete AR-15 bolt carrier group in 9310 alloy steel with a nitride finish, made in the USA, and an M4 Mil-Spec charging handle complete the upper side. The lower completion package is fully covered with a complete Mil-Spec AR-15 lower parts kit, a purpose-built heavy duty pistol buffer tube, a standard carbine buffer at 3 oz., and a carbine recoil spring made in the USA. A Gauntlet Arms black nylon reinforced polymer stabilizing brace closes out the rear end. Lower receiver not included.

Key Features

• 5.56 NATO chambering, 11.5-inch government profile 4150 CrMoV steel barrel, phosphate 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 inch, phosphate finish
• 7075-T6 aluminum upper receiver, anodized, M4 feed ramps
• AR-15 ejection port door assembly
• Standard AR-15 forward assist assembly
• 10-inch ultra-lightweight minimalist freefloat M-LOK handguard, aircraft-grade 6061-T6 aluminum, black, partial top Picatinny rail
• Complete AR-15 bolt carrier group, 9310 alloy steel, nitride finish, made in the USA, 5.56, .223, .300, .350 compatible
• AR-15 M4 Mil-Spec charging handle
• Complete Mil-Spec AR-15 lower parts kit
• Heavy duty pistol buffer tube, aluminum
• 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
• AR-15 carbine castle nut
• Gauntlet Arms polymer stabilizing brace, nylon reinforced polymer, black
• A2 GI Birdcage flash hider, steel, manganese phosphate finish, 1-2x28 thread pitch
• Black 1-2-inch crush washer

Perfect For

• AR-15 pistol builders who need everything above the lower receiver for a lightweight 5.56 NATO build
• Shooters pairing this kit with an existing stripped or complete AR-15 lower receiver
• Builders who want a brace included with a complete lightweight pistol component set

Upper Assembly

The 7075-T6 aluminum upper receiver with an anodized finish and M4 feed ramps forms the core of the front end, with a standard forward assist assembly and an AR-15 ejection port door assembly built in. The 11.5-inch government profile 4150 CrMoV barrel brings a phosphate finish and 1-7 twist 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 inch with a phosphate finish run a clean, low-profile gas system along the barrel. The 10-inch ultra-lightweight minimalist handguard in aircraft-grade 6061-T6 aluminum surrounds the barrel and gas system with a freefloat M-LOK design that keeps weight to a minimum while a partial top Picatinny rail gives the builder a solid optic and accessory mounting position at the front end without running unnecessary rail along the entire handguard.

Bolt Carrier Group and Charging Handle

The complete AR-15 bolt carrier group brings 9310 alloy steel construction with a nitride finish, made in the USA, and covers 5.56, .223, .300, and .350. The 9310 alloy steel bolt head is a strong material choice for the bolt carrier group and pairs well with the nitride finish across the component. The M4 Mil-Spec charging handle works with the BCG inside the upper receiver to complete the upper interior and finish the front end of the build.

Lower Completion Components

The complete Mil-Spec AR-15 lower parts kit addresses the full internal lower component group, covering the fire control group, magazine catch, bolt catch, and all associated pins and springs. The heavy duty pistol buffer tube in aluminum, standard carbine buffer at 3 oz., and standard carbine recoil spring made in the USA form the buffer system at the rear of the lower, matched to the pistol platform. The Mil-Spec AR-15 M16 receiver end plate and AR-15 carbine castle nut lock the buffer tube down cleanly at the rear of the lower. The Gauntlet Arms black nylon reinforced polymer stabilizing brace fits over the pistol buffer tube and closes out the rear end of the build with a solid, lightweight brace option.

Muzzle Device

The A2 GI Birdcage flash hider is steel with a manganese phosphate finish, threaded at 1-2x28 to match the barrel. The phosphate finish on the flash hider ties into the phosphate finish on the barrel and gas block for a consistent finish profile across the muzzle end. 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. Lower receiver not included.