The Daniel Defense M4A1 features a M4A1 RIS II handguard CNC machined of 661-T6 aluminum with a hard coat anodized finish. It has a chrome moly vanadium steel, chrome lined barrel with a permanently attached Daniel Defense flash suppressor. The upper and lower receivers are CNC machined of 775-T6 aluminum with a hard coat anodized finish, while the rail panels are made from Santoprene and is heat resistant. The buttstock and pistol grip are constructed of polymer with a Soft touch overmolding. This model has a 14.5" barrel with a heavy phosphate coating, FDE finish handguard, and black receiver.