Sig Sauer M400 Sentry Package 5.56 NATO 16″ Rifle – ROMEO5 G2 & Foxtrot MSR Light
The M400 Sentry is a complete, ready-to-use system that integrates the M400-SDI X platform with the versatile capabilities of the ROMEO5 G2 red dot sight and the Foxtrot-MSR Full Size Light. Designed for enhanced control, it features a vertical foregrip on a free-floating handguard, ensuring stability across various shooting positions.
The ROMEO5 G2 red dot sight offers a precise 1x aiming solution with a sharp 2 MOA dot and boasts over 40,000 hours of estimated runtime, thanks to SIG SAUER’s motion-activated MOTAC technology. Built for durability, it carries an IPX7 waterproof rating, and its fully multi-coated lenses provide clear visibility in all conditions. Convenient top-mounted illumination controls allow for effortless operation by both left- and right-handed users.
The Foxtrot-MSR Full Size Light delivers 1,250 lumens and 33,000 candela, providing powerful illumination while maintaining accessibility and ease of use. The package also includes three M-LOK rail covers and a 30-round polymer magazine.
Complete Ready‑to‑Use SystemIncludes ROMEO5 G2 red dot, Foxtrot‑MSR light, vertical foregrip, and rail covers for immediate deployment.
Enhanced Target AcquisitionROMEO5 G2 offers a sharp 2 MOA dot, 1x aiming, and MOTAC motion activation for instant readiness.
High‑Output IlluminationFoxtrot‑MSR delivers 1,250 lumens and 33,000 candela for superior visibility in low‑light environments.
Free‑Floating M‑LOK HandguardImproves accuracy and allows flexible accessory mounting while maintaining a lightweight feel.
Match‑Grade Trigger SystemSIG 2‑Stage Matchlite Duo trigger provides a clean, predictable break for improved precision.
Durable ConstructionHard‑coat anodized receiver, chrome/moly steel barrel, and IPX7‑rated optic ensure long‑term reliability.
Ergonomic ControlReduced‑angle grip, Magpul SL stock, and ambidextrous safety enhance comfort and adaptability for all shooters.
Optimized Recoil & HandlingMid‑length direct impingement system and flash hider‑compensator support smoother cycling and faster follow‑ups.
Specifications
- Caliber: 5.56 NATO
- Sights: SIG ROMEO5 G2
- Barrel Length: 16″
- Barrel Material: Chrome / Moly Steel
- Twist Rate: 1:7
- Threads: 1/2×28, Tapered Shoulder
- Muzzle Device: SIG Flash Hider‑Compensator
- Action Type: Semi‑Automatic
- Operating System: Mid‑Length Direct Impingement
- Stock Type: 6‑Position Black Magpul SL
- Grip Type: Reduced Angle
- Trigger Type: SIG 2‑Stage Matchlite Duo
- Trigger Shape: Flat
- Manual Safety: Ambidextrous
- Forend Type: M‑LOK Black Anodized Alloy
- Accessory Rail: M‑LOK / Picatinny
- Magazine Type: AR‑15
- Magazines Included: 30‑Round Polymer Magazine (x1)
- Color: Black
- Receiver Finish: Hard Coat Anodized
- Overall Length: 36.5″
- Collapsed Length: 33.3″
- Overall Width: 2.8″
- Height: 7.1″
- Weight: 7.0 lbs
