DRD Tactical proprietary barrel nut works with the DRD Tactical Quick Takedown Build Kit to allow for multiply barrels to be used. Simply use any barrel compatible with the .223/5.56 action, add gas block and gas tube, and the DRD barrel nut will give you the ability to swap barrels in seconds!
AR-15, Issue:11, Page:004
Big Book Catalog, Issue:70, Page:003
416 Stainless Steel