Sig Sauer M400 Sentry

The Sig Sauer M400 Sentry is a versatile rifle designed for shooters who demand precision and reliability. This firearm combines the trusted performance of the M400-SDI X platform with the adaptable features of the Romeo5 Genii red dot, Foxtrot-MSR Full Size Light, and a vertical foregrip. Ideal for home defense, advanced training, or recreational shooting, the M400 Sentry is ready to perform right out of the box.

Developed with insights from professional instructors at Sig Sauer Academy, the M400 Sentry ensures top-tier reliability and performance. The pre-installed Romeo5 Genii red dot offers a 1x aiming solution with a crisp 1 MOA dot, boasting over 40,000 hours of runtime thanks to Sig Sauer’s motion-activated MOTAC design. Its IPX7 waterproof rating and fully-multicoated lenses guarantee visibility in any environment, with top mount illumination controls for ambidextrous use.

The Foxtrot-MSR Full Size Light enhances visibility in low-light conditions with 1,250 lumens and 33,000 candela, ensuring targets are clearly illuminated. The vertical foregrip on the free-floating handguard provides superior control, regardless of shooting position.

• Equipped with Romeo5 Genii red dot, Foxtrot-MSR Full Size Light, and vertical foregrip for enhanced functionality
• Features fully ambidextrous controls including safety, charging handle, and bolt catch & release
• Includes a free-floating M-LOK forend with three M-LOK rail covers
• Comes with a Sig 2-Stage Matchlite Duo trigger for precise shooting
• Built with a 16” chrome/moly steel barrel featuring a 1:7 twist rate
• Fitted with a 6-position Magpul MOE-SL stock for adjustable comfort
• Designed with a low profile gas block and mid-length operating system