RIFLE: DANIEL DEFENSE MODEL DD4 CARBINE, SERIAL NUMBER DD4009178, BLACK (MATTE), YES - INCLUDES PROTECTIVE CASE, SEMI - AUTOMATIC, 5.56 NATO, 16 Notes: The Daniel Defense M4A1 is a high-quality AR-15 platform rifle known for its durable construction, reliability, and proven design. Chambered in 5.56 NATO, this M4A1 features a 14.5-inch barrel with a permanently attached muzzle device, a Daniel Defense RIS II rail system, and a rugged aluminum receiver set. The rifle is designed for dependable performance and is an excellent choice for collectors, enthusiasts, or shooters looking for a premium AR-15.