Description
The Order M400-SDI X is a premium, factory-built AR-15 rifle from Sig Sauer. It features a 16-inch cold hammer-forged barrel with a 1:8 twist rate, housed in a lightweight M-LOK handguard. The rifle comes equipped with a Sig Sauer Romeo5 red dot sight and a Magpul MOE stock and pistol grip, providing a complete, high-performance package ready for the range or duty use straight from the case.
Key Features
- 16″ Cold Hammer Forged Barrel, 1:8 Twist, Nitride Coated
- Includes Sig Sauer Romeo5 Red Dot Sight
- Lightweight M-LOK Aluminum Handguard
- Magpul MOE Stock and MOE Grip
- Sig Sauer Enhanced Trigger and Ambidextrous Safety
Specifications
| Caliber / Type | 5.56 NATO / .223 Remington AR-15 Rifle |
|---|---|
| Material | 7075-T6 Aluminum Upper/Lower, Steel Barrel |
| Finish | Hardcoat Anodized, Nitride Barrel Finish |
| Compatibility | Standard AR-15/M4 Components & Magazines |
| Weight | 6.7 lbs (unloaded) |
The M400-SDI X’s cold hammer-forged barrel provides exceptional durability and consistent accuracy by work-hardening the steel. The 1:8 twist rate optimally stabilizes a wide range of 5.56mm and .223 Remington bullet weights from 55 to 77 grains. This configuration, paired with the direct-mount Romeo5, creates a reliable system for defensive use, competition, or extended training sessions where shot consistency is critical.
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