SIG Sauer M400 Sdi 5.56 NATO 16" 30-Round FDE Rifle

The SIG Sauer M400 SDI 5.56 NATO 16" 30-Round FDE Rifle is a purpose-built modern sporting rifle engineered for law enforcement, military, and civilian tactical applications. Designed by SIG Sauer—a manufacturer with deep roots in both military contracts and professional duty weapons—this platform delivers the reliability and accuracy demanded in high-stakes environments.

The 16-inch barrel length provides optimal velocity and handling balance, making it equally effective for close-quarters tactical operations and medium-range precision work. The M400 SDI features SIG Sauer's proven gas-piston operating system, which reduces carrier tilt, minimizes fouling, and extends component service life compared to direct-impingement designs—a critical advantage in extended-use scenarios.

This rifle benefits law enforcement tactical teams, military units, and serious civilian shooters who require a compact, reliable platform capable of accepting standard AR-15 accessories and optics. The 30-round magazine capacity allows for extended shooting sessions without frequent reloads, making it a practical choice for various shooting applications.