An M4 is a compact, military-style assault rifle with a matte black finish and a rugged, tactical appearance. It features a short barrel with a flash suppressor at the muzzle, a modular handguard with rail systems for attachments like grips, lights, or lasers, and a collapsible stock that adjusts for length. The upper receiver has a flat top rail, typically fitted with iron sights or an optical scope, while the lower receiver includes a pistol grip and magazine well that holds a curved 30-round magazine. Its design is sleek, functional, and built for versatility and close-quarters combat.