This lighter weight, fully ambidextrous version of our industry-standard DDM4 offers right- and left-handed shooters with even more flexibility and control. A 12.5" RIS III rail provides easy attachment/detachment of M-LOK accessories, and a mid-length gas system provides smooth, reliable cycling while also reducing perceived recoil and wear and tear on parts. FEATURES: 16" chrome-lined, heavy-phosphate-coated Government-profile barrel for accuracy and durability Fully ambidextrous lower enables shooter to operate important rifle mechanisms without moving dominant hand from rifle grip 12.5" RIS III Rail-modeled after the RIS II two-piece handgu Mfg: Daniel Defense