Davidson Defense Aegis 7.5" Stainless Steel 5.56 NATO AR-15 Pistol Build Kit, M-Lok, 1:7, w/ SBM4 Brace

Aegis 7.5" Stainless Steel 5.56 NATO AR-15 Pistol Build Kit, M-Lok, 1:7, w/ SBM4 Brace

This is a complete AR-15 pistol build kit featuring a stainless steel 7.5-inch barrel paired with an SB Tactical SBM4 stabilizing brace. The kit includes everything needed to complete a lower receiver except the serialized lower itself. The upper assembly uses a mil-spec aluminum receiver with a 7-inch M-LOK handguard, nitride bolt carrier, and micro low-profile gas block tuned for the pistol-length gas system. Total weight comes in at 83.12 ounces.

Key Features

• 416R stainless steel 7.5-inch barrel with 1:7 twist rate and government profile
• SB Tactical SBM4 stabilizing brace for controlled one-handed shooting
• 7-inch M-LOK compatible handguard in aircraft-grade aluminum
• Mil-spec upper receiver in 7075-T6 aluminum with anodized finish
• Nitride bolt carrier with micro low-profile gas block for pistol-length cycling
• Complete lower parts kit, buffer tube, buffer, recoil spring, end plate, and castle nut included
• 1/2x28 threaded muzzle with GI birdcage flash hider

Perfect For

• Shooters building a compact AR-15 pistol for home defense or range use
• Pistol platform enthusiasts who want a complete kit without piecing components together
• Builders seeking a stainless barrel option for corrosion resistance
• Those wanting a stabilized pistol configuration with proven brace technology

Stainless Steel Durability and Corrosion Resistance

The 416R stainless steel barrel resists rust and corrosion in wet or humid environments, making this kit suitable for shooters who don't want to maintain a traditional carbon steel barrel as frequently. Stainless barrels naturally shed moisture and require less aggressive cleaning schedules. This becomes especially valuable if you're shooting outdoors in variable conditions or storing the firearm in less-than-ideal environments.

SB Tactical SBM4 Brace Integration

The SBM4 is one of the most widely adopted stabilizing braces in the pistol AR market. It wraps around your arm to provide a stable shooting platform while remaining compact and lightweight. The design allows for quick transitions and doesn't interfere with charging handle operation or magazine changes. The brace is already installed and ready for use out of the box.

Pistol-Length Gas System Performance

This kit uses pistol-length gas tuning optimized for the 7.5-inch barrel, which means the gas block is positioned closer to the muzzle than a rifle-length system. This configuration cycles reliably with the 3-ounce buffer included in the kit. The micro low-profile gas block keeps the handguard profile clean and doesn't interfere with M-LOK mounting accessories.

Lower Receiver Not Included

This full build kit includes all components needed to complete a lower receiver except the serialized lower receiver itself. You'll need to source a mil-spec AR-15 lower receiver separately to finish the build.

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