The SIG M400 is a true AR platform tactical rifle designed for use in law-enforcement, military operations, or the sporting field. The M400 provides unparalleled accuracy, with a 16" chrome-lined and phosphate coated barrel that provides maximum durability and corrosion resistance. The rifle runs on a direct impingement gas-operating system with rotating locking bolt. Every M400 comes with an A2 Type flash suppressor. A 7075-T6 aircraft grade aluminum forged lower receiver adds to the durability and reliability. The Enhanced M400 features a Magpul MOE forend, grip, stock, and rear sight and comes with a 30-round Magpul PMag.