Description
The SIG SAUER M400-TREAD V2 COIL is a premium, factory-built upper receiver assembly designed for the modular TREAD platform. It features a 16-inch, cold hammer-forged 4150 steel barrel with a 1:8 twist rate, finished with a corrosion-resistant Nitride coating. This complete upper is engineered for direct compatibility with the M400 TREAD lower receiver, offering a robust and accurate foundation for your AR-15 build.
Key Features
- 16″ Cold Hammer Forged 4150 Steel Barrel with 1:8 Twist
- Durable Nitride Finish on Barrel for Enhanced Wear Resistance
- M-LOK Compatible SIG SAUER TREAD 15″ Free-Float Handguard
- Includes SIG SAUER MBUS Flip-Up Front and Rear Sights
- Factory-Assembled Upper with Forward Assist and Dust Cover
Specifications
| Caliber / Type | 5.56 NATO / .223 Remington (Complete Upper Receiver) |
|---|---|
| Material | 4150 Steel Barrel, 7075-T6 Aluminum Upper |
| Finish | Hardcoat Anodized Upper, Nitride Barrel |
| Compatibility | SIG SAUER M400 TREAD Lower Receiver (Mil-Spec) |
| Weight | Approx. 4.5 lbs (Upper Only) |
The M400-TREAD V2 COIL’s performance stems from its SIG-crafted CHF barrel, which increases longevity and maintains consistent accuracy. The 1:8 twist rate optimally stabilizes a wide range of 5.56mm and .223 Remington bullet weights from 55 to 77 grains. Paired with the rigid free-float handguard, this setup minimizes point-of-impact shift and is built for demanding range use and tactical training scenarios.
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