Sig Sauer M400 Sentry Sdi 5.56 Nato 16 inch 30 Round Blued Black

The SIG RM400SDI16BR5FX M400 Sentry builds on the M400-SDI X platform to deliver a ready-to-go semi-auto rifle for duty, range, and tactical training, equipped with a 16" threaded 5.56 NATO barrel with 1:7" twist and Sig Flash Hider for reliable ballistics and suppressor compatibility; the Magpul SL stock and 33.25"×36.50" overall length let you tailor length of pull for seated, prone, or vehicle work while the 8 lb package weight keeps handling controlled during extended shoots. The Sentry series pairs the ROMEO5 GENII 1x red dot—2 MOA reticle, fully multicoated lenses, motion-activated MOTAC with over 40,000 hours runtime and IPX7 waterproofing—with a Foxtrot-MSR Full Size light producing 1,250 lumens and 33,000 candela so target ID and low-light clearance are fast and intuitive; top-mounted illumination controls are ambidextrous for right- or left-handed users and the free-floating M-LOK handguard with vertical foregrip improves point of aim stability from unsupported positions. Built on an alloy steel receiver with a Sig Two-Stage Matchlite Duo trigger and ambidextrous safety, this rifle offers a 30+1 capacity and arrives configured for practical application by hunters, instructors, and patrol personnel, and requires FFL transfer.