The SIG Sauer M400 Forge is a semi-automatic AR-style rifle chambered for 5.56 NATO and supplied with a ROMEO-MSR Gen II 2 MOA red-dot optic and one 10-round magazine. It combines a TriggerTech two-stage flat blade trigger with a Magpul SL‑K adjustable stock and an M-LOK handguard to provide a configurable, range-ready platform. Controls and features are arranged for straightforward operation and modular accessory mounting.
Key Specifications
- The rifle is chambered in 5.56 NATO.
- The action type is semi-automatic.
- The trigger is a TriggerTech 3.5-pound two-stage flat blade.
- The included optic is a ROMEO-MSR Gen II 2 MOA red dot.
- The handguard is a M-LOK aluminum free-floating design.
- The stock is a Magpul SL‑K 6-position adjustable stock.
- The barrel material is cold hammer-forged steel.
- The magazine capacity supplied is one 10-round magazine.
- The rifle weight with magazine is approximately 6.8 lb.
- The receiver and external finish are supplied in a matte black/black anodized appearance in most listings.
The M400 Forge is intended for informed shooters seeking a service-style AR platform outfitted for practical range use and accessory mounting. Its TriggerTech two-stage trigger and low-profile, optic-ready receiver make it suitable for precision-focused sighting with a red-dot optic while the M-LOK interface supports lights, grips and other ergonomics-driven attachments.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
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