Sig Sauer M400 with Prismatic Scope: * Designed for use in law enforcement, military operations, the sporting field and competitive shooting * True AR platform tactical rifle * Unparalleled accuracy * 16" chrome-lined phosphate-coated barrel * Superior corrosion resistance * 7075-T6 aircraft-grade aluminum-forged lower receiver * Durable and reliable * Removes the front sight tower and replaces it with an M1913 railed-front gas block * Allows the operator to mount any optic without worrying about the sight tower * Gas block accepts all iron sights designed to work on the Mil-Spec Picatinny rail