Faxon Firearms .458 Socom / .450 Bushmaster Bolt Nitride 9310 Tool Steel Mpi

The Faxon Firearms .458 Socom / .450 Bushmaster Bolt - Nitride delivers enhanced strength and reliability for high-pressure hunting and tactical builds, featuring a 9310 tool steel bolt that outperforms C158 in strength and durability, a salt bath nitride finish to increase surface hardness, reduce resistance, and provide superior corrosion resistance compared to standard chrome or phosphated bolt carriers. Every bolt is fully MPI tested to ensure sound material and defect-free performance, with bolt lugs chamfered at 45 degrees to promote smooth, reliable action under even the highest pressure hand loads and fast lightweight cycles. The extractor is constructed from S7 tool steel and is sprung with a precise combination of spring, o-ring, and silicone insert for secure chambering and consistent ejection. Back-of-lugs are expertly chamfered for added reliability, and the complete assembly comes black oxide coated for a stealth matte finish. Note: bolts ordered and deployed with barrels not specifically checked by Faxon for headspacing must be checked to ensure safe and reliable function; Faxon recommends Pacific Tool & Gauge headspace kits for all measurements, with detailed instructions available in their blog post. This high-performance bolt assembly is designed for serious shooters seeking durability, precision, and long-term value in .458 SOCOM and .450 Bushmaster platforms.