The SIG SAUER M400 SDI 5.56MM AR Pistol is engineered for operators requiring a compact, high-performance solution. Designed as a short-barreled rifle alternative, this platform offers tactical maneuverability without compromising 5.56MM capability. KFF Defense evaluates this system as a robust option for close-quarters applications, vehicle operations, or as a primary defensive firearm where a full-length rifle is impractical.
Key Features
Optimized Configuration
The M400 SDI features an 11-inch barrel, precisely calibrated to provide an optimal balance between ballistic performance and a minimized overall footprint. This barrel length enhances weapon handling in confined spaces and facilitates rapid target acquisition. The AR pistol configuration ensures compact utility, making it adaptable for various operational profiles.
Durable Construction
Constructed with high-grade materials, the M400 SDI leverages SIG SAUER’s manufacturing standards for sustained reliability. The receiver set is precision machined to ensure tight tolerances and consistent component integration. Its direct impingement operating system is a proven design, contributing to the platform’s reliability and consistent cyclic rate.
Accessory Integration
Equipped with a free-floating M-LOK handguard, the M400 SDI facilitates direct attachment of mission-essential accessories such as lights, lasers, and vertical grips, without impacting barrel harmonics. A full-length Picatinny top rail accommodates diverse optic and iron sight configurations, ensuring precise targeting solutions.
Technical Specifications
- **Caliber:** 5.56x45mm NATO
- **Barrel Length:** 11 inches
- **Magazine Capacity:** 30 Rounds
- **Action:** Semi-Automatic
- **Operating System:** Direct Impingement
- **Finish:** Black Anodized
- **SKU:** LIP|SIPM400SDI11BLK
