Product Overview
The SIGM400 5.56 NATO rifle with a 16 in barrel delivers a semi-automatic platform built around a Romeo-MSR Gen II optic, a telescoping stock, and an aluminum M-LOK handguard in a black finish. The package includes a 10-round magazine.
Key Features
- Caliber: 5.56 NATO
- Action: Semi-automatic
- Barrel length: 16 in
- Optic: Romeo-MSR Gen II
- Stock: Telescoping stock (Tele Stock)
- Handguard: Aluminum M-LOK HG
- Finish: Black
- Magazine included: (1) 10RD MAG
Specifications
- Product name: SIGM400
- Cartridge: 5.56 NATO
- Fire control: Semi
- Barrel length: 16 in
- Optics model: Romeo-MSR Gen II
- Handguard system: M-LOK (aluminum)
- Magazine capacity: 10 rounds
- Color/finish: Black
Benefits and Performance Notes
With a 16 in barrel and integrated Romeo-MSR Gen II optic, the SIGM400 is configured for quick target acquisition and consistent sighting alignment. The telescoping stock supports adjustment for different shooting positions, while the aluminum M-LOK handguard provides a modular mounting interface for accessories.
Use Cases
- Range sessions with 5.56 NATO ammunition
- Training activities requiring a semi-automatic 16 in configuration
- Target-focused setups benefiting from an included red-dot optic
- Accessory-equipped builds using an M-LOK handguard
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