SIG Sauer M400 SDI X-Series 5.56 NATO Rifle
SIG Sauer M400 SDI X-Series in 5.56 NATO features a 16" chrome moly barrel, free-floating M-LOK handguard, ambidextrous controls, Sig Match Grade trigger, and Magpul SL-K stock. 30-round magazine included.
SIG Sauer M400 SDI X-Series: Modern Tactical Rifle Design
The M400 SDI X-Series represents a thoughtful evolution of the modern sporting rifle platform. SIG Sauer has equipped this rifle with features that matter to shooters who demand reliability and precision.
Key Features
Barrel and Action
- 16" chrome moly steel barrel with hybrid flash hider/compensator
- 7075 T-6 aluminum receiver with black hardcoat anodized finish
- Free-floating M-LOK handguard minimizes deflection from mounted accessories
- Lightning-cut upper and lower receivers reduce weight without sacrificing strength
Controls and Ergonomics
- Fully ambidextrous controls: bolt catch, release selector switch, charging handle, and magazine release
- Sig Flat Match Grade 2-Stage Matchlite trigger for crisp, predictable breaks
- Magpul SL-K 6-position telescoping stock adapts to different shooters and shooting positions
- Black polymer grip provides secure purchase in all conditions
Accessory Mounting
- 15" M-LOK handguard offers flexible mounting options for lights, lasers, and other tactical accessories
- Handguard clamp system engineered to maintain zero and minimize shift under load
The Practical Advantage
Whether you're training at the range, competing in tactical matches, or preparing for home defense, the M400 SDI X-Series delivers the features serious shooters expect. The combination of precision trigger control, ambidextrous operation, and modern ergonomics makes this rifle equally at home in the hands of experienced shooters and those new to the platform.
Includes 30-round magazine.
Features
- fluted competition barrel
- sig flatblade match trigger
- hybrid compensator/flash hider
