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 M400-SENTRY 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. – 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 1 MOA dot the ROMEO5 GENII provides over 40000 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 1250 Lumens and 33000 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 – CALIBER 5.56 NATO – SIGHTS ROMEO5 GENII Installed – BARREL LENGTH 16 in [406.4 mm] – BARREL MATERIAL Chrome / Moly Steel – TWIST RATE 1:7 – THREADS 1/2 in-28 tpi tapered shoulder – MUZZLE DEVICE SIG Flash Hider-Compensator – ACTION TYPE Semi-Auto – OPERATING SYSTEM Mid-Length Direct Impingement – STOCK TYPE 6-Position Magpul MOE-SL Black – GRIP TYPE Reduced Angle – TRIGGER TYPE SIG 2-Stage Matchlite Duo – TRIGGER SHAPE Flat – MANUAL SAFETY Ambidextrous – FOREND TYPE Free-Floating M-LOK Alloy – ACCESSORY RAIL M-LOK/Picatinny ROMEO5 GEN II FOXTROT-MSR FULL SIZE Vertical Foregrip – MAG TYPE AR-15 – MAGS INCLUDED (1) 30rd Polymer Mag – COLOR Black – RECEIVER FINISH Black Anodized – OVERALL LENGTH 36.5 in – COLLAPSED LENGTH 33.25 in – OVERALL WIDTH 2.8 in – HEIGHT 9.3 in – WEIGHT 8.0 lb – FORWARD ASSIST Yes