SIG Sauer M400 ROSE 5.56 NATO 16in ROMEO5, 2x30rd

About this product

The SIG Sauer M400 ROSE is a feature-rich AR-style rifle developed in collaboration with competitive shooter Lena Miculek and the ROSE program. It combines a 16‑inch chrome-moly barrel with a low-profile mid-length operating system and ambidextrous controls to support a broad range of shooters. The rifle ships with a ROMEO5 Gen II red-dot optic, Magpul MOE‑SL stock, and two 30‑round polymer magazines, making it suitable for range training, sport shooting, and responsible personal ownership. Distinctive rose-gold accents and a rose-engraved M-LOK handguard provide a unique aesthetic while retaining standard AR functionality.

Key Specifications

• Chambered for .223 Rem / 5.56 NATO for use with common cartridges.
• The barrel measures 16 inches and is made from chrome-moly steel.
• The barrel features a 1:7 twist rate.
• Threading uses a 1/2″-28 pattern with a tapered shoulder.
• The muzzle is fitted with a SIG flash hider‑compensator.
• An installed ROMEO5 Gen II red-dot optic is included.
• The action is semi-automatic.
• Operating system is a mid-length direct impingement gas system.
• The stock is a 6-position Magpul MOE‑SL (black) telescoping unit.
• Included magazines: (2) 30‑round polymer AR-15 style magazines.

Built to provide a reliable, approachable platform, the M400 ROSE blends practical features and user-focused ergonomics. Its combination of familiar AR controls, a proven mid-length system, and included sighting and carrying accessories make it a ready-to-use option for range work and training. The ROSE package balances capability and accessibility for owners looking for a well-equipped modern sporting rifle with distinctive styling.

Related Videos: