The Sig Sauer M400 Forge is an AR-platform, semi-automatic rifle configured for practical range and training use. This FDE-finished build ships with a ROMEO-MSR Gen II 2 MOA red-dot optic, a free‑floating M-LOK handguard, and an adjustable Magpul SL-K stock. The package includes one 30‑round polymer magazine and a TriggerTech two-stage flat blade trigger for consistent, repeatable breaks.
Key Specifications
- The rifle is chambered in 5.56 NATO.
- The action is semi-automatic.
- Includes a ROMEO-MSR Gen II 2 MOA red-dot optic.
- Equipped with a TriggerTech 3.5‑pound two-stage flat blade trigger.
- The barrel is constructed from cold hammer forged steel.
- The barrel twist rate is 1:7.
- Features a free-floating aluminum M-LOK handguard with full-length Picatinny rail.
- Fitted with a Magpul SL-K 6-position adjustable stock.
- Includes one 30‑round polymer magazine.
- Unloaded weight measures approximately 6.8 lb.
This M400 Forge configuration provides an optic-ready platform with modular accessory mounting and adjustable ergonomics suitable for range sessions, training, and modular AR setups. The combination of a cold hammer forged barrel, TriggerTech trigger, and ROMEO-MSR optic yields a dependable, user-friendly package that prioritizes consistent function and straightforward adaptability.
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.
