Sig Sauer M400 Sentry 5.56 NATO 16-Inch 30-Round Rifle

Description

The Sig Sauer M400 Sentry is a semi-automatic rifle chambered in .223 Rem./5.56 NATO with a 16-inch barrel. Its configuration includes a Romeo5 Gen II red dot, Foxtrot-MSR full-size light, vertical foregrip, free-floating M-LOK forend, and one 30-round polymer magazine.

With its adjustable Magpul MOE-SL stock, ambidextrous safety, and mid-length direct-impingement operating system, the M400 Sentry is configured for range use and structured training.

Key Specifications

• The .223 Rem./5.56 NATO chambering supports the cartridges listed for this rifle.
• A 16-inch chrome/moly steel barrel provides the specified barrel length for range and training use.
• The 1:7 twist rate is matched to the barrel configuration specified by the manufacturer data.
• The semi-automatic action cycles one round with each trigger press.
• The 30-round detachable magazine provides the listed ammunition capacity.
• The installed Romeo5 Gen II red dot provides the listed optic aiming system.
• The Foxtrot-MSR full-size light is included as part of the configured package.
• The free-floating M-LOK forend provides the listed modular accessory interface.
• The 6-position Magpul MOE-SL stock offers adjustable length of pull.
• At 8 pounds, the rifle has the listed unloaded weight.

This setup is suited to shooters who want a factory-configured M400 platform with an included optic, light, foregrip, and magazine. The combination of a 16-inch barrel, M-LOK forend, adjustable stock, and ambidextrous controls gives the package a practical configuration for range sessions and training.

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