Sig M400 Xseries 556nato 16" 30rd

The SIG Sauer M400 X-Series 556 NATO is a modern semi-automatic rifle built for operators and serious shooters who demand precision and reliability in a compact package. Built on the proven AR platform, this 16-inch carbon steel barrel rifle delivers the velocity and accuracy needed for tactical applications, training courses, and home defense scenarios. The anodized black finish provides corrosion resistance while maintaining a professional tactical appearance.

Key specifications include a 16-inch barrel paired with a mid-length gas system and low-profile gas block, which optimizes the balance between sight radius, maneuverability, and dwell time. The SIG Flatblade Match Trigger delivers a crisp, predictable break for improved shot placement. The Magpul SL stock provides a secure cheek weld and comfortable controls. The rifle ships with a 30-round magazine and accepts standard AR platform ammunition and components, making it compatible with industry-standard upgrades and accessories.

This configuration is optimized for operators transitioning from military or law enforcement platforms, as well as serious civilians pursuing advanced shooting instruction. The compact 16-inch profile reduces length for vehicle storage and confined spaces while the 556 NATO chambering provides established ballistics and ammunition availability. At 9.94 pounds, the rifle remains manageable during dynamic shooting drills and extended training sessions.

SIG Sauer's M400 platform has been proven across law enforcement and military units globally, establishing a track record in professional service environments. This X-Series variant incorporates refined ergonomics and trigger performance that reflect feedback from end users operating in high-stress conditions.