Sig Sauer M400-SENTRY For Sale

The M400-SENTRY offers a ready-to-go solution for the most discerning shooters, combining the proven capabilities of the M400-SDI X platform with the multi-purpose functionality of the ROMEO5 GENII red dot, FOXTROT-MSR™ Full Size Light and a vertical foregrip. This combination of standardized features makes the M400-SENTRY an out-of-the-box solution for home/personal defense, advanced training or recreational shooting.

Like other rifles in the series, the Sig Sauer M400-SENTRY For Sale was developed based on the direct input of professional instructors at SIG SAUER Academy. Their decades of combined experience and personal knowledge ensures that all M400 rifles are designed to meet the highest standards of reliability and performance.

Sig Sauer M400-SENTRY For Sale

Adding to the advanced capabilities of the M400 platform is the pre-installed ROMEO5 GENII red dot, FOXTROT-MSR Full Size Light and vertical foregrip. With its 1x aiming solution and crisp 2 MOA dot, the ROMEO5 GENII provides over 40,000 hours of estimated runtime compliments of SIG SAUER’s motion-activated MOTAC™ design. The ROMEO5 GENII is IPX7 waterproof rated, and its fully-multicoated lenses ensure visibility in all environments. Top mount illumination controls provide ease of use by both left and right-handed shooters.

For added visibility in low-light conditions, the FOXTROT-MSR Full Size Light with its 1,250 Lumens and 33,000 Candela, clearly illuminates targets while maintaining ease of use and accessibility. The M400-SENTRY is also furnished with a vertical foregrip on the free-floating handguard, enabling greater control of the rifle regardless the shooting position.

FEATURES INCLUDE:

• ROMEO5 GENII Red Dot, FOXTROT-MSR Full Size Light and Vertical Foregrip
• Fully Ambidextrous Controls (Safety, Charging Handle, Bolt Catch & Release)
• Free-Floating M-LOK Forend
• (3) M-LOK Rail Covers Included
• SIG 2-Stage Matchlite Duo Trigger
• 16” Chrome/Moly Steel Barrel with 1:7 Twist Rate
• 6-Position Magpul MOE-SL Stock
• Low Profile Gas Block with Mid-Length Operating System

Key Specifications:

• Model: Sig Sauer M400 Sentry
• Type: Semi-Automatic Rifle
• Caliber: 5.56×45mm NATO / .223 Remington
• Operating System: Gas-operated, direct impingement
• Barrel Length: 16 inches (406 mm)
• Barrel Profile: M4 Contour
• Barrel Material: 4150 CMV (Chrome Moly Vanadium) Steel
• Barrel Twist: 1:7″ (right-hand twist)
• Rifling: 6 grooves
• Overall Length: 32.75 inches (with stock collapsed) to 36.5 inches (with stock extended)
• Weight: Approximately 7.5 lbs (3.4 kg)
• Stock: Adjustable, M4-style collapsible stock
• Handguard: Free-floating M-LOK handguard
• Sights: Adjustable, flip-up sights (typically included), or optics can be mounted on a Picatinny rail
• Upper Receiver: Forged aluminum
• Lower Receiver: Forged aluminum
• Finish: Hard-coat anodized (for durability and corrosion resistance)
• Magazines: Typically comes with a 30-round Magpul PMAG
• Trigger: Standard mil-spec trigger (single-stage)
• Safety: Ambidextrous safety selector
• Gas Block: Adjustable for different operating conditions (standard in many M400 models)
• Muzzle Device: Flash suppressor (typically)
• Rail System: Picatinny rail for optics, accessories, and other attachments
• Pistol Grip: Ergonomically designed for comfort
• Forward Assist: Yes (mil-spec feature)
• Bolt Carrier Group: M16-style
• Function: Semi-automatic, gas-operated with direct impingement system

Notable Features:

• Reliability: Built to perform in harsh environments with ruggedness, making it a great choice for tactical applications.
• Ergonomics: Lightweight, adjustable stock, and smooth controls provide ease of use.
• Modularity: M-LOK handguard allows for customizable attachment of accessories like lights, grips, and slings.
• Durability: Designed for long service life with quality materials like the 4150 CMV steel and anodized aluminum.
• Sights and Optics: Includes a set of flip-up iron sights but can easily be fitted with optics or other sighting systems.

Intended Use:

• Personal Defense: The M400 Sentry is suitable for self-defense and tactical applications.
• Sport Shooting: It’s commonly used for recreational shooting, tactical training, and competitions.
• Military & Law Enforcement: Used by both military personnel and law enforcement agencies in some regions.

The Sig Sauer M400 Sentry is a well-rounded and reliable rifle, providing a combination of performance and practicality.