SIG Sauer M400 Forge 5.56 16.5″ Concrete Gray 30rd

Overview

The SIGM400 SIG Sauer SIGM400 5.56 NATO rifle is configured with a 16 in barrel, Forge Elite Concrete finish, semi-automatic action, and a ROMEO-MSR Gen II optic. The platform includes a telescoping stock, AL M-LOK handguard, and includes one 30-round magazine.

Key Features

• Model: SIGM400
• Caliber: 5.56 NATO
• Barrel length: 16 in
• Action: Semi (semi-automatic)
• Handguard: AL M-LOK HG
• Stock: Tele stock (telescoping)
• Optic: ROMEO-MSR Gen II
• Magazine included: (1) 30RD mag
• Finish: Forge Elite Concrete

Specifications

• Product type: Rifle
• Chambering: 5.56 NATO
• Barrel length: 16 in
• Operating mode: Semi-automatic
• Mounting/optic system: ROMEO-MSR Gen II
• Handguard interface: M-LOK
• Included magazine capacity: 30 rounds

Benefits

With a 16 in configuration, M-LOK handguard interface, telescoping stock, and an integrated ROMEO-MSR Gen II optic, the SIGM400 is built for a streamlined setup that supports consistent aiming and straightforward accessory mounting. The Forge Elite Concrete finish provides a distinctive look across the rifle’s external surfaces.

Use Cases

• Range sessions requiring a 5.56 NATO semi-automatic rifle with a 16 in barrel
• Optics-forward setups using the ROMEO-MSR Gen II
• Configurations that benefit from an M-LOK handguard for accessory attachment
• Training and practice involving a 30-round magazine