Description
The M400-SDI X PISTOL is a modern, direct-impingement AR-style pistol from Sig Sauer, engineered for compact performance and reliability. It features a durable 7075-T6 aluminum upper and lower receiver with a hard-coat anodized finish for superior corrosion resistance. This model is built around a 10.5-inch cold hammer-forged barrel and is chambered in 5.56 NATO/.223 Remington, offering a highly maneuverable platform for close-quarters use and personal defense.
Key Features
- 10.5-inch cold hammer-forged barrel with 1:7 twist rate
- Sig Sauer Minimalist Plus collapsible stock
- M-LOK compatible free-float handguard for accessory mounting
- Enhanced trigger guard and ambidextrous safety selector
- Includes Sig Sauer’s proprietary pistol stabilizing brace
Specifications
| Caliber / Type | 5.56 NATO / .223 Remington |
|---|---|
| Material | 7075-T6 Aluminum |
| Finish | Hard-Coat Anodized |
| Compatibility | Standard AR-15 pattern components |
| Weight | Approx. 6.2 lbs |
The M400-SDI X utilizes a direct impingement gas system paired with a carbine-length gas tube, a proven setup for reliable cycling with a wide range of 5.56mm ammunition. The cold hammer-forged barrel provides extended service life and consistent accuracy. Its overall length and brace configuration make it a practical choice for home defense and tactical training scenarios where a full-length rifle is not optimal.
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