Description
The M400-SDI X from SIG SAUER is a premium, factory-built AR-15 platform designed for immediate deployment. This model features a 16-inch cold hammer-forged barrel with a 1:7 twist rate, finished with a durable Nitride coating for enhanced corrosion resistance. It comes equipped with a free-float M-LOK handguard and a SIG SAUER Enhanced Trigger Group, offering a robust and accurate foundation right out of the box.
Key Features
- 16″ Cold Hammer Forged Barrel with 1:7 Twist
- Nitride Barrel Finish for Extreme Durability
- SIG SAUER Enhanced Trigger Group (ETG)
- Free-Float M-LOK Aluminum Handguard
- Includes SIG SAUER MSR 1-6x24mm Scope and ROMEO Zero Red Dot
Specifications
| Caliber / Type | 5.56 NATO / .223 Remington AR-15 Rifle |
|---|---|
| Material | 7075-T6 Aluminum Upper/Lower, Steel Barrel |
| Finish | Hard Coat Anodized, Nitride Barrel |
| Compatibility | Standard AR-15/M4 Parts & Magazines |
| Weight | Approx. 6.7 lbs (unloaded) |
The M400-SDI X’s cold hammer-forged barrel provides superior accuracy and longevity by work-hardening the steel for a consistent bore. The 5.56 NATO chambering offers effective terminal ballistics for defense and training, while the 1:7 twist rate stabilizes a wide range of bullet weights. The integrated optics package ensures a versatile sighting solution for close-quarters and medium-range engagements.
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