Meet the M400-FORGE

FORGED IN FREEDOM.

BUILT FOR THE MISSION.

Upgraded Where It Matters. Ready From Day One.

Introducing the all-new M400-FORGE, a modern 5.56 NATO rifle built for shooters who demand reliability, precision, and performance.

Designed to deliver capability right out of the box, the M400-FORGE combines durable construction with the features shooters typically upgrade to later.

EXPERIENCE THE M400-FORGE. BUILT TO PERFORM

Features:

TriggerTech 3.5 lb Two-Stage Flat Blade Duty Trigger:
Delivers a crisp, predictable break for improved control and accuracy.

ROMEO-MSR Gen II Red Dot Included: A rugged 2 MOA optic with 12 illumination settings and up to 35,000 hours of runtime.

16″ Cold Hammer Forged Barrel with Mid-Length Gas System:
Engineered for durability, smoother cycling, and consistent performance.

Full-Length M-LOK Handguard with Full Picatinny Rail: Provides maximum flexibility for lights, grips, and mission-specific accessories.

Ambidextrous Charging Handle and MAGPUL SL-K Stock: Modern ergonomics designed for fast, confident handling.

Available in four color options: Black, Concrete Gray, FDE, and Moss Green.

Built by SIG SAUER and backed by the SIG Infinite Guarantee, the M400-FORGE delivers trusted performance and durability for the range, defense, and beyond.

Engineered for durability, smoother cycling, and consistent performance.

EXPERIENCE THE M400-FORGE. BUILT TO PERFORM

Our promise

We guarantee that your new SIG SAUER firearm, optic, or suppressor was originally manufactured free of defects in material, workmanship, electrical, optical, and mechanical function. In the event it becomes damaged from defect in any way we will repair your SIG SAUER product, at no charge to you. If we cannot repair your product, we will replace it or, if we cannot replace it, we will provide you with a replacement of equal value.

Fits Everything, Misses Nothing.

Meet HEXIUM™ – our most adaptable line of suppressors. Purpose-built to deliver best-in-class sound reduction and low back pressure, the new HEXIUM line from SIG SAUER offers a sleek, modular design with unmatched versatility.

Now shipping in 5.56 NATO, the HEXIUM556 suppressor is available in both a lightweight titanium and robust Inconel suppressor body. The titanium variant offers superior performance without sacrificing durability while the Inconel version is designed for high-volume use.

ADD A HEXIUM CAN TO YOUR QUIVER NOW

Must-Have M400 Accessories