Daniel Defense’s DD5 V4 Upper Receiver Group is a perfect upgrade to a DD5 V1 or V2 rifle, but can also be used as an alternative caliber option for a V3, V4 or V5. It comes equipped with a user-adjustable gas block for reliable and consistent shooting with a suppressor, and an optimized bolt carrier group is outfitted with a buffer to reduce overall recoil. Other features include a bolt with enhanced extractor geometry and dual ejectors for reliable cycling, and a GRIP-N-RIP charging handle with anti-gas technology is included for a better shooting experience.