The WMD Guns Bolt Assembly is engineered to deliver peak performance for the 450 Bushmaster platform, blending NiB-X nickel boron coating with a precision-made case-hardened 9310 bolt that is shot peened and magnetic particle inspected for dependable reliability. This bolt features a high-performance extractor, robust ejector springs, and carefully tuned gas rings to ensure smooth cycling under demanding conditions, while the special O-ring buffer contributes to consistent, quieter operation and extended component life. Coated components include the bolt and extractor, providing superior corrosion resistance, easier cleaning, and enhanced locking and unlocking action with barrel extensions for repeatable chambering and reliable lockup. The result is a durable, low-maintenance bolt assembly that supports repeatable accuracy, quick target reacquisition, and long-term service in harsh field environments. Whether upgrading a field-ready rifle or building a precision-oriented setup, this bolt assembly from WMD Guns delivers the durability and performance you expect, combining advanced coatings with proven core components to maximize reliability, longevity, and consistent performance in every shot.