The Sig Sauer M400 Forge 5.56 NATO 16" Black With Romeo-MSR Gen II Red Dot is a complete, optic-equipped AR-15 built for smooth handling and consistent accuracy. A 16" cold hammer forged barrel with a mid-length gas system works with the free-floating 15" M-LOK handguard to keep recoil manageable and shots predictable, while the included Romeo-MSR Gen II 2 MOA red dot delivers fast, clear sighting right out of the box.

This model’s TriggerTech 3.5-pound two-stage flat blade duty trigger provides a crisp, repeatable break that benefits both precision work and rapid strings at the range. The ambidextrous charging handle and six-position Magpul SL-K stock support a wide range of shooters and shooting positions, making the rifle well suited for training, general range use, and practical defensive roles. Sig Sauer’s attention to detail in the M400 series reflects the brand’s reputation for reliable engineering and thoughtful refinement.

Key Features:

• Manufacturer: Sig Sauer
• Model: M400 Forge
• Caliber: 5.56x45mm NATO
• Condition: New
• Action: Semi-Automatic
• Barrel Length: 16" Cold Hammer Forged
• Number of Magazines: 1
• Capacity: 10+1
• Optic Footprint: Romeo-MSR Gen II 2 MOA Red Dot
• Unique Features: TriggerTech Two-Stage Flat Blade Duty Trigger, 15" Free-Float M-LOK Handguard, Ambidextrous Charging Handle, Magpul SL-K Adjustable Stock
• Night Sights: No
• External Safety: Yes
• Threaded Barrel: Yes
• What's In The Box: Rifle, 10-Round Magazine, Romeo-MSR Gen II Red Dot
• Weight: 6.8 lbs
• Length: 32.25" Collapsed / 35.5" Extended
• Width: 2.7"