Sig Sauer M400 ROSE 5.56 NATO 16″ ROMEO5 | RM400-16B-ROSE-R5X2

The SIG Sauer M400 ROSE is a feature-rich AR-style rifle built around a 16-inch chrome-moly barrel and chambered for .223 Rem / 5.56 NATO. It ships with a ROMEO5 GENII red dot installed and a 10-inch free-floating M-LOK handguard with ROSE engraving, plus rose-gold colored controls. The rifle is configured with ambidextrous controls and a 6-position Magpul MOE-SL stock to accommodate a wide range of shooters. Suggested optic: the included SIG ROMEO5 GENII pairs directly with the M400 ROSE for close- to mid-range target work and personal training.

Applications: range training and competitive-style practice or instructor-led skill development for new shooters.

Product Specifications

• The cartridge is listed as .223 Rem / 5.56 NATO.
• The barrel measures 16 inches.
• The barrel uses a 1:7 twist rate.
• The action is Semi-Auto.
• The operating system is Mid-Length Direct Impingement.
• The stock is a 6-position Magpul MOE-SL (black).
• An installed optic is a ROMEO5 GENII red dot.
• Included magazines are two 30‑round polymer magazines.
• Handguard configuration is a 10-inch free-floating M-LOK with ROSE engraving.
• The muzzle device is a SIG flash hider-compensator.
• The trigger is a SIG 2-Stage Matchlite Duo.
• The manual safety is ambidextrous.
• The receiver finish is black anodized.
• The handguard and accessory interface is M-LOK.
• UPC: 798681716593.

The M400 ROSE is built as a ready-to-use package that balances ergonomic controls and a compact handling profile with components selected for approachable recoil and straightforward operation. Its ROMEO5 GENII optic and Magpul furniture make it suitable for range-focused training programs and practical marksmanship drills where quick target acquisition and reliable ergonomics matter.

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