5.56mm Bolt Assy

The Daniel Defense Bolt Assembly is a complete, drop‑in bolt assembly engineered for AR‑15/M4‑pattern rifles chambered in 5.56×45 NATO and .300 AAC Blackout (.300 BLK). Built to meet the durability and dimensional standards required for modern semi‑automatic and select‑fire platforms, the assembly includes the bolt head, extractor and gas rings plus the internal components required for proper function (firing pin and retaining hardware are typically included depending on the package). Finished for corrosion resistance and heat‑treated for long service life, this bolt assembly provides the robust extraction, reliable ignition, and consistent headspacing shooters expect from Daniel Defense parts — making it suitable as a factory replacement, upgraded component for hard‑use environments, or spares for maintenance and armory inventories.