Maxim Defense Industries MD9 904S, Semi-automatic Rifle, SBR, 9MM, 4.5 Barrel, MLOK Handguard, Anodized Finish, Black, BCM Gunfighter Grip, Maxim SCW Stock, ALG Defense Combat Trigger, Radian Raptor Charging Handle, Radian Talon Ambidextrous Safety, 1 Magazine, 33 Rounds MXM-49712 When you're looking for Maxim Defense ingenuity in a new standard AR-9, the MD-9 is your answer. The MD-9 was engineered to fit the growing demand for cutting-edge AR9 style rifles for today's Military and commercial market. For increased comfort and versatility every MDX features their free-floating barrel with their custom handguard. These handguards provide a monolithic-like upper receiver platform and M-Slot compatibility.