SIG SAUER M400 FORGE 11.5 inch 5.56 NATO pistol with ROMEO MSR Gen II red dot and MAGPUL BSL arm brace, in store image

SIG SAUER M400 FORGE 11.5 Pistol 5.56 NATO with ROMEO MSR Gen II

Sig Sauer
SKU:
101-33312
$999.99
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Description

SIG SAUER M400 FORGE 11.5" Pistol 5.56 NATO with ROMEO MSR Gen II

The SIG SAUER M400 FORGE is a premium AR-platform pistol engineered to deliver exceptional reliability, accuracy, and modern features straight from the factory. Chambered in 5.56 NATO and equipped with an 11.5-inch cold hammer forged barrel, the M400 FORGE is designed for defensive use, range training, and recreational shooting while maintaining the durability shooters expect from SIG SAUER.

One of the standout features of the M400 FORGE is its factory-installed TriggerTech Two-Stage Flat Blade Duty Trigger, providing a crisp, predictable trigger pull that enhances both precision and control. Combined with the carbine-length gas system and free-float 10-inch M-LOK handguard, the rifle delivers excellent handling and consistent performance.

This model also includes a factory-installed SIG SAUER ROMEO MSR Gen II red dot optic featuring a crisp 2 MOA red dot, allowing shooters to get on target quickly right out of the box. The ambidextrous charging handle, full-length Picatinny rail, and M-LOK attachment system provide ample flexibility for lights, slings, lasers, and other accessories.

Finished with a durable black anodized receiver and equipped with a MAGPUL BSL Arm Brace and ergonomic polymer grip, the M400 FORGE offers premium features in a compact and dependable platform.

Key Features

  • 11.5" cold hammer forged barrel
  • 5.56 NATO / .223 Remington compatible
  • Carbine-length gas system
  • TriggerTech Two-Stage Flat Blade Duty Trigger
  • Factory-installed SIG SAUER ROMEO MSR Gen II red dot
  • 2 MOA red dot reticle
  • 10" free-float M-LOK handguard
  • Ambidextrous charging handle
  • Full-length Picatinny top rail
  • MAGPUL BSL Arm Brace
  • Black anodized alloy receiver
  • 30-round magazine included

Specifications

Manufacturer SIG SAUER
Model M400 FORGE
Manufacturer Part Number RM400556N11BFORGE
Type Semi-Automatic AR Pistol
Caliber 5.56 NATO / .223 Remington
Capacity 30+1
Barrel Length 11.5"
Barrel Material Cold Hammer Forged Steel
Barrel Finish Black
Gas System Carbine Length
Receiver Black Anodized Alloy
Handguard 10" Free-Float M-LOK
Trigger TriggerTech Two-Stage Flat Blade Duty Trigger
Charging Handle Ambidextrous
Brace MAGPUL BSL Arm Brace
Grip Black Polymer
Optic Included SIG SAUER ROMEO MSR Gen II (2 MOA Red Dot)
Sights None
Overall Height 7.20"
Overall Width 2.70"
Finish Black Anodized

What's Included

  • SIG SAUER M400 FORGE 11.5" Pistol
  • SIG SAUER ROMEO MSR Gen II Red Dot (Installed)
  • MAGPUL BSL Arm Brace
  • 30-round magazine
  • Owner's manual

Ready for the Range

With the factory-installed ROMEO MSR Gen II optic and TriggerTech trigger, the M400 FORGE arrives ready for the range. The cold hammer forged barrel delivers long service life and consistent accuracy, while the free-float M-LOK handguard provides plenty of room for accessories without affecting barrel harmonics.

Why Choose the SIG SAUER M400 FORGE?

The M400 FORGE brings together premium components from some of the industry's most respected manufacturers into one complete package. With its TriggerTech trigger, factory-installed SIG optic, cold hammer forged barrel, and modern ergonomic features, it offers outstanding value for shooters looking for a dependable, feature-rich AR pistol that performs right out of the box.