The DD5 V4 Upper Receiver Group, chambered in 6.5 Creedmoor, provides users of the Daniel Defense semi-automatic platform even greater long-range precision shooting capability. Whether you want to upgrade your DD5 V1 or V2, or have an alternative caliber option for your V3, V4 or V5, the highly popular 6.5 Creedmoor takes advantage of superior ballistic coefficients to offer both flatter trajectories and reduced wind drift at levels normally reserved for much heavier recoiling long action calibers. These gains in ballistic efficiency help the modern shooter stretch the effective range out to 1,000 meters or more. This highly accurate and durable upper includes an adjustable gas block that allows for a consistent feel whether shooting suppressed or unsuppressed. The perfected bolt carrier group reduces overall recoil impulse and is easy to maintain and operate in all conditions. Not compatible with traditional AR10 platforms