Sig Sauer M400 Rose 5.56 Nato 16 Romeo5X2 10Rd

The Sig Sauer M400 ROSE 5.56 NATO rifle is purpose-built for shooters seeking a modern AR platform with thoughtful ergonomics and quality componentry. Developed in collaboration with competitive shooter and instructor Lena Miculek, the M400 ROSE combines the proven M400 platform with hand-picked features designed to deliver a shooter-centric experience. The 16-inch chrome-moly steel barrel with 1:7 twist rate cycles the popular 5.56 NATO cartridge with reliable mid-length direct impingement operation, while the semi-auto action delivers consistent performance whether you're training at the range or building marksmanship fundamentals.

Ergonomics are front and center here. The rifle ships with an ambidextrous manual safety and mag release, accommodating both left and right-handed shooters without modification. The 6-position Magpul MOE-SL stock is adjustable to fit different body frames and shooting styles, and the reduced-angle grip pairs with the SIG 2-Stage Matchlite Duo trigger—flat-faced for a direct, clean press. The 10-inch M-LOK handguard is free-floating for accuracy consistency and offers plenty of rail real estate for mounting lights, lasers, or other accessories without adding unnecessary bulk.

The ROMEO5 GENII red dot sight comes pre-installed and zeroed, letting you get rounds downrange immediately. Two 10-round polymer magazines are included, keeping you supplied for range sessions or training. At 7 pounds unloaded and 36.5 inches overall length (33.25 inches collapsed), the M400 ROSE stays light and maneuverable. The matte black receiver and rose gold-colored controls give the rifle a distinctive look while the SIG Flash Hider-Compensator manages recoil and blast signature. Everything from the trigger to the stock reflects real-world feedback from shooters of all skill levels, making this a straightforward, capable rifle for those stepping into the AR platform or adding to an existing collection.

Key Features

• Semi-auto 5.56 NATO with 16-inch chrome-moly barrel (1:7 twist rate)
• Mid-length direct impingement operating system for reliable, low-maintenance function
• Pre-installed ROMEO5 GENII red dot sight with integrated carry handle compatibility
• Ambidextrous safety and mag release for left and right-handed shooters
• 6-position adjustable Magpul MOE-SL stock to customize length of pull
• Free-floating 10-inch M-LOK handguard for modular accessory mounting
• SIG 2-Stage Matchlite Duo trigger with flat face for clean, predictable reset
• Reduced-angle grip and rose gold controls for distinctive handling
• SIG Flash Hider-Compensator to reduce muzzle rise and manage recoil
• Includes two 10-round AR-15 magazines

Specifications

Frequently Asked Questions

What sights come with the M400 ROSE?

The rifle ships with a ROMEO5 GENII red dot sight pre-installed and ready to use. The GENII platform supports common AR-15 mounting standards, so you can add backup iron sights or swap optics as your shooting evolves.

Can left-handed shooters use this rifle without modification?

Yes. The M400 ROSE features ambidextrous safety and mag release, making it fully functional for both left and right-handed operators without any changes needed.

What magazine capacity is included?

Two 10-round AR-15 compatible polymer magazines are included with the rifle.

Is the handguard suitable for mounting a light or laser?

Yes. The 10-inch M-LOK handguard is fully compatible with M-LOK accessories, giving you a modular platform to attach lights, vertical grips, lasers, or other tactical gear without modifying the rifle.