SIG Sauer RM40016BTRDV2G M400 556 5.56 NATO 56-Round Carbine

The SIG Sauer M400 Tread 2.0 5.56×45 NATO rifle with 16-inch barrel and moss green finish delivers a modern, mission-ready platform purpose-built for training, law enforcement patrol, and tactical applications. This direct-impingement carbine combines proven reliability with a compact form factor, making it suitable for operators who require fast target acquisition, controllable recoil, and real-world ergonomics without unnecessary features that complicate field maintenance.

The 16-inch barrel optimizes velocity for 5.56 rounds while maintaining maneuverability in confined spaces—a proven length in patrol carbines and entry roles. The M400 Tread 2.0 ships with one 30-round polymer magazine, providing standard capacity for professional use. The integrated flash hider mitigates muzzle signature and blast overpressure during indoor operations or in support of team movement. Polymer furniture on stock and handguard reduces weight to 8 lbs overall, critical for extended duty cycles. The picatinny rail system accepts standard optic mounts and accessories, enabling users to configure the rifle to their mission profile without proprietary adapters.

This M400 variant serves law enforcement agencies, military personnel transitioning to civilian marksmanship, and precision shooters who prioritize reliability over aesthetic customization. The moss green finish provides discretion in field environments while resisting corrosion in varied climates. Operators familiar with the AR-15 platform will recognize the standard controls and maintenance procedures, reducing training overhead on duty rosters.

The 5.56×45 NATO cartridge remains the NATO standard for small arms, ensuring ammunition availability in professional supply chains and commercial markets worldwide. SIG Sauer's M400 line has established a reputation for consistency across police departments and small-team units, prioritizing durability and zero retention over rapid feature iteration.