.223 Remington - 16 4140 M4 contour steel barrel - 1:9 twist - 7075-T6 forged upper and lower receiver - A2 Birdcage flash hider - Carbine-length gas system - M16 Nitride bolt carrier group - Single stage mil-spec trigger - M4-style polymer handguard - Mil-spec 6 position stock - Mil-spec A2 grip - Rail-height gas block accommodates flip-up sight - Weighs 6.2 lbs -