Product Description The WMD Guns Bolt Assembly for .450 Bushmaster is engineered for reliable performance and long service life, featuring WMD&&';;s NiB-X (nickel boron) coating for reduced friction, easier cleaning, and smooth locking/unlocking with barrel extensions. Built from case-hardened 9310 steel and validated with shot peening and magnetic particle inspection, this bolt assembly is designed to support demanding use with upgraded extractor, ejector springs, and gas rings. Product Highlights NiB-X nickel boron coating on the bolt and extractor for low-friction operation and simplified maintenance Case-hardened 9310 steel construction for strength and durability Shot-peened and Magnetic Particle Inspected (MPI) for enhanced reliability High-performance extractor, ejector springs, and gas rings for consistent cycling Includes a special O-ring buffer to support positive extraction Specs Brand: WMD Guns Product Type: Bolt Assembly Compatibility/Chambering: .450 Bushmaster Coating/Finish: NiB-X (Nickel Boron) Material: 9310 steel (case hardened) Manufacturing/QA: Shot peened; Magnetic Particle Inspected (MPI) MPN: 1-NIBXBA450 UPC: 854839008566 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.