Forged Enhanced BUILDER Set NIGHTHAWK-11″ M-LOK Rail/Upper/Lower – Dark Tungsten

Description

(ENHANCED BUILDER SET with HANDGUARD) (Dark Tungsten)

Dark Tungsten Cerakote Upper/Lower/NIGHTHAWK-11 M-LOK RAIL Receiver Set machined from 7075 T6 aluminum forgings.  Includes SI Polymer Dust Cover and Forward Assist Assembly installed.

Build a rifle that exceeds expectations with the SOTMFG Legacy 2.0 Matched Upper/Lower Set paired with the NIGHTHAWK 11″  M-LOK Rail, engineered for shooters who demand exceptional strength, precision, and reliability. Whether you’re assembling a duty-ready carbine, upgrading a competition setup, or creating a premium custom build, this matched set delivers unmatched fit, finish, and performance.

Both receivers start with 7075-T6 aluminum forgings, offering superior rigidity and impact resistance compared to standard 6061 builds. Because of this aerospace-grade material, your rifle maintains tighter tolerances, improved consistency, and long-term durability under recoil and hard-use conditions. Additionally, each unit receives a premium Cerakote finish, providing corrosion resistance, enhanced wear protection, and a clean professional appearance.

The included NIGHTHAWK-11 M-LOK Rail System adds modularity and ergonomics. Its slim profile provides excellent handling, while the M-LOK slots allow precise accessory placement for lights, grips, lasers, bipods, and mission-critical attachments. Moreover, the rail’s improved heat dissipation and barrel clearance ensure consistent performance during extended sessions or suppressed operation.

To streamline your build, the upper arrives with a Strike Industries Polymer Dust Cover and a Mil-Spec Forward Assist Assembly already installed. Additionally, our A4 upper includes extended M4 feed ramps, delivering smoother feeding and enhanced reliability—especially beneficial when running different ammo types or rapid fire strings. The top Picatinny section is milled for reduced weight while still maintaining strength.

Because this is a Legacy 2.0 Matched Set, you get a tighter receiver-to-receiver fit, resulting in improved alignment, reduced movement, and better overall shooting feel.

Both receivers are machined to strict Mil-Spec requirements, ensuring broad compatibility with high-quality aftermarket components. The lower also offers a flared magwell, multi-caliber markings, and standard .154″ trigger and hammer pin holes, giving you flexibility for nearly any AR-15 configuration.

With a lifetime warranty against manufacturing defects, this set is built to be the foundation of a rifle that will last for generations.

---

LOWER FEATURES:

• Legacy 2.0 Matched Set (tight upper/lower fit)

• Cerakote finish for extreme durability

• CNC machined from 7075-T6 aluminum forging

• .154″ diameter trigger & hammer pin holes

• Multi-cal marked for build flexibility

• Flared magwell for faster, easier reloads

• Lifetime warranty against manufacturing defects

---

UPPER (A4) FEATURES

• Strike Industries Polymer Dust Cover installed

• Legacy 2.0 Matched Set (tight fit with lower)

• Cerakote finish

• Mil-Spec forward assist assembly installed

• Milled top Picatinny rail (reduced weight)

• Machined from 7075-T6 aluminum forging

• Extended M4 feed ramps for enhanced feeding reliability

• Machined to Mil-Spec requirements

• SOT logo precision laser engraved

---

NIGHTHAWK-11 M-LOK RAIL FEATURES

• Slim, ergonomic profile for improved handling

• Multiple M-LOK slots for accessory mounting

• Excellent barrel clearance and heat dissipation

• Durable, lightweight construction Ideal For

• Duty-grade and defensive rifle builds

• Premium AR-15 custom builds

• Competitive shooting

• Range use and training

• Builders requiring tight tolerances and long-term durability

Notice:

Item must ship to an FFL. Please let us know which FFL will be receiving this item in the Comment box during checkout. If you need help we will assist you. Please have the FFL of your choice  fax a signed copy of their license to 407-703-5947 and include your name and order number on the cover sheet. We usually have this product in stock and ready to ship but there may be a slight delay in shipping due to a high volume of orders and if you are wanting this product immediately please give us a call or email us.