The Colt M5 Carbine Sentry Rifle is a semi-automatic, direct gas impingement rifle chambered in 5.56mm NATO, representing the next generation of evolution in Colt's legacy line of high-performance military and sporting arms. This modern carbine incorporates a 16.1-inch free-floating barrel with a 1:7" right-hand twist rate and an A2 flash hider, built onto newly redesigned forged 7075-T6 aluminum upper and lower receivers finished in a matte black Type III hardcoat anodizing. Operating on a reliable carbine-length gas system with a pinned low-profile gas block, it is uniquely engineered with full ambidextrous lower receiver controls (magazine catch, bolt release, and safety selector) alongside an ambidextrous Radian Raptor charging handle to ensure seamless operation from either hand. The optimized, ergonomic layout is rounded out by a 15.1-inch one-piece aluminum free-floating M-LOK handguard, a continuous MIL-STD-1913 top rail, a standard single-stage trigger, a Magpul CTR 6-position collapsible buttstock, and premium folding low-profile adjustable Troy BattleSights. The rifle typically feeds from an included 30-round Magpul PMAG, yielding a total standard deployment capacity of 30+1. Colt M5 Carbine 5.56mm 16.1" Bbl Semi-Auto Matte Black Rifle CM556-16-M5S