Sig Sauer M400 Forge Features The Sig Sauer M400 Forge earns its place among serious modern sporting rifles through a combination of premium components and battle-tested engineering. Its cold hammer forged steel barrel with FNC finish delivers exceptional accuracy and long-term durability under sustained fire. The mid-length gas system reduces felt recoil and muzzle rise keeping follow-up shots fast and controlled. Ergonomics and adaptability are central to the M400 Forge experience starting with a 15 M-LOK handguard that offers ample real estate for accessories while keeping the rifle lightweight and balanced. As a capable 5.56 AR-15 rifle it delivers a crisp consistent 3.5-pound TriggerTech pull that inspires confidence in both precision and rapid-fire applications. A 6-position Magpul SL-K stock and ambidextrous charging handle round out a setup that adapts naturally to any shooter s preference or mission profile. Sig Sauer M400 Forge Specifications Manufacturer: Sig Sauer Model: M400 Forge Caliber: 5.56 NATO Barrel Length: 16 Barrel Material: Cold hammer forged steel Barrel Finish: FNC Barrel Twist: 1:7 Overall Length: 32.25 collapsed 35.5 extended Overall Height: 9.4 with optic 7.2 without optic Overall Width: 2.7 Weight: 6.8 lb. with magazine Magazine Capacity: 30 rounds Frame Material: Alloy Frame Finish: Anodize Trigger: TriggerTech 3.5-pound two-stage flat blade duty trigger Sights: ROMEO-MSR Gen II 2MOA red dot Stock: Magpul SL-K 6-position Handguard: 15 M-LOK with full Picatinny rail Charging Handle: Ambidextrous