SIG Sauer RM40016BTRDV210 M400 556 5.56 NATO Rifle

The SIG Sauer RM40016BTRDV210 M400 5.56 NATO rifle is a modular direct-impingement platform designed for tactical operators, law enforcement, and civilian shooters who demand reliability and accuracy in a versatile rifle system. Built on the proven M400 platform, this rifle serves as a dependable workhorse for home defense, training, and field deployment scenarios where a lightweight, standard-caliber rifle is essential. The 5.56 NATO chambering ensures compatibility with military-grade ammunition while offering excellent velocity and energy retention across typical engagement distances.

This rifle features a mid-length gas system that balances recoil management with bolt reliability, reducing wear and extending service intervals compared to carbine-length systems. The 8.45-pound weight distribution provides excellent handling without inducing fatigue during extended drills or tactical operations. The modular design allows for customization of furniture, optics mounts, and accessories, making this platform adaptable to mission-specific requirements. The 34.5-inch overall length strikes a practical balance between portability and sight radius, while the direct-impingement operation ensures proven performance with standard 5.56 NATO ammunition across all pressure levels.

Law enforcement agencies, military personnel, and responsible civilian shooters benefit most from the M400 platform's track record of dependability in high-stress environments. The rifle readily accepts standard AR-15 compatible components, allowing users to tailor ergonomics, stock systems, and accessory rails to their specific preferences. Proper maintenance and use of quality ammunition will ensure consistent performance; the 5.56 NATO chambering is the industry standard for tactical rifles, offering proven terminal performance and cost-effective training ammunition availability. This is a Class III FFL firearm and subject to all applicable federal, state, and local firearms regulations.