Description
SIG Sauer M400 Forge Pistol with ROMEO-MSR Gen II, 5.56 NATO, 11.5" Barrel, 30-Round
The SIG M400 FORGE pistol is SIG’s duty AR in 11.5 in.: a cold-hammer-forged barrel, TriggerTech’s 3.5 lb two-stage, and a factory ROMEO-MSR Gen II 2 MOA already on the rail.
The FORGE pistol is that same duty package in 11.5 in.: cold-hammer-forged barrel, carbine-length gas, TriggerTech 3.5 lb two-stage, factory ROMEO-MSR Gen II 2 MOA, and Magpul’s BSL brace. SIG lists it at 6.2 lb, 29.8 in. extended and 27.8 in. collapsed. Height with the optic is 9.4 in.
SIG mounts the ROMEO-MSR Gen II at the factory so the pistol leaves the box with a 2 MOA red dot. The charging handle is ambidextrous. The handguard is free-float M-LOK with a full-length top rail. Magpul’s BSL brace is the furniture on this pistol, not an SL-K stock.
This 11.5 in. FORGE pistol
This is the pistol, not the 16 in. FORGE rifle. 11.5 in. CHF barrel, carbine-length gas, A2 birdcage, one 30-round magazine. SIG lists 6.2 lb and 27.8–29.8 in. overall. The factory optic is a ROMEO-MSR Gen II 2 MOA.
What ships
This is a serialized 5.56 pistol and ships to a licensed FFL.
Specifications and Included Items
- Model: PM400-556N-11B-FORGE
- Caliber: 5.56 NATO
- Barrel: 11.5 in. cold-hammer-forged steel, 1:7 twist
- Muzzle: A2 birdcage flash hider
- Operating system: Carbine-length direct impingement
- Trigger: TriggerTech 3.5 lb two-stage flat blade
- Optic: Factory ROMEO-MSR Gen II 2 MOA
- Handguard: Free-float M-LOK / full-length Picatinny
- Brace: Magpul BSL pistol stabilizing brace
- Charging handle: Ambidextrous
- Finish: Black anodized
- Overall length: 29.8 in. extended, 27.8 in. collapsed
- Height: 9.4 in. with optic
- Weight: 6.2 lb
- Magazine included: One 30-round polymer AR-15 magazine
- FFL: Pistol; ships to a licensed FFL dealer







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