Daniel Defense 02-191-03270-047 DD4 RIII 5.56mm 16" RifleMore control, more flexibility, less weight. That’s what you get with our revolutionary RIII rifles. The new DD4 lower receiver is the same you've come to love, trust, and expect from Daniel Defense, only now fully ambidextrous. Our all-new RIS III rail system is modeled after the proven RIS II developed for SOCOM, but now in M-LOK for extreme durability with less weight. It features our hardcore 6-Bolt, Bolt-Up System used on the RIS II, and the same two-part free-float design that never makes contact with the barrel - not even with an M203 grenade launcher installed - so barrel harmonics and accuracy are not affected. The lightweight, heavy-hitting RIII is ready for anything. Daniel Defense DD4 RIII 5.56mm 16" Rifle 02-191-03270-047