Sig Sauer M400 Rose w/Romeo Gen III Rifle 5.56mm 30rd Magazine 16" Threaded Barrel 6 Position Stock

The Sig Sauer M400 ROSE is a 5.56 NATO rifle built from the ground up with input from competitive shooter and instructor Lena Miculek to serve shooters of all experience levels—especially those new to the AR platform. This isn't a generic tactical carbine dressed up in marketing language; it's a thoughtfully engineered rifle that prioritizes manageable recoil, intuitive controls, and a platform that grows with you. The 16-inch chrome-moly steel barrel with 1:7 twist rate and mid-length direct impingement system deliver reliable performance whether you're punching paper at 100 yards or pushing farther downrange, while the included SIG Flash Hider-Compensator helps tame muzzle rise.

What sets the M400 ROSE apart is attention to fit and usability. The free-floating 10-inch M-LOK handguard keeps things lightweight and maneuverable without sacrificing accessory mounting flexibility. Ambidextrous safety and magazine release work equally well for left- and right-handed shooters. The 6-position Magpul SL stock lets you dial in length of pull to your frame, and the reduced-angle grip feels natural in the hand. The flat-faced SIG 2-Stage Matchlite Duo trigger is crisp and predictable—ideal for learning proper fundamentals or taking accurate shots under pressure.

The rifle ships ready to use with a ROMEO5 GENII red dot mounted and zeroed, giving you a proven close-to-mid-range optic out of the box. Two 30-round AR-15 magazines, a custom ROSE Savior soft-sided case, and training rounds round out the package. At 7 pounds and 36.5 inches overall (33.25 inches collapsed), the M400 ROSE handles like a rifle designed for people, not just by spec sheet.

Key Features

• 16-inch chrome-moly steel barrel with 1:7 twist, 1/2x28 threads, and SIG Flash Hider-Compensator
• Mid-length direct impingement operating system for reliable function and moderate recoil
• Free-floating M-LOK handguard (10 inches) for accuracy and accessory mounting
• ROMEO5 GENII red dot sight included and pre-mounted
• Ambidextrous manual safety and magazine release for either-handed operation
• SIG 2-Stage Matchlite Duo trigger with flat trigger face
• 6-position adjustable Magpul MOE-SL stock for custom length of pull
• Reduced-angle AR-style grip in matte rose gold anodized finish
• Comes with two 30-round AR-15 magazines, protective case, training rounds, and combination lock

Specifications

Caliber	5.56 NATO
Action	Semi-automatic
Barrel Length	16 inches
Barrel Material	Chrome/moly steel
Barrel Twist	1:7
Muzzle Threading	1/2 inch-28 tpi tapered shoulder
Muzzle Device	SIG Flash Hider-Compensator
Operating System	Mid-length direct impingement
Stock	6-position Magpul MOE-SL, black anodized
Grip	Reduced angle, matte rose gold anodized
Handguard	10-inch free-floating M-LOK alloy
Accessory Rail	M-LOK
Trigger	SIG 2-Stage Matchlite Duo, flat face
Manual Safety	Ambidextrous
Receiver Finish	Black anodized
Optic Included	ROMEO5 GENII red dot
Magazine Capacity	30 rounds (2 magazines included)
Magazine Type	AR-15 polymer
Overall Length	36.5 inches (stock extended)
Collapsed Length	33.25 inches
Width	2.75 inches
Height	7.1 inches
Weight	7 pounds

Frequently Asked Questions

Is the M400 ROSE suitable for left-handed shooters?

Yes. The rifle features ambidextrous manual safety and magazine release, making it equally functional for right- and left-handed operation.

What optic comes with this rifle?

The M400 ROSE ships with a ROMEO5 GENII red dot sight already mounted and ready to use.

What's included in the box?

The rifle comes with two 30-round AR-15 polymer magazines, a custom ROSE Savior soft-sided carrying case, a rose gold combination lock, and three 5.56 dummy rounds with bag for training purposes.

Can I attach accessories to the handguard?

Yes. The 10-inch free-floating M-LOK handguard supports standard M-LOK accessories for lights, lasers, and other tactical gear.