The Faxon Firearms FAXON 5.56 9310 BOLT NITRIDE BLK represents a refined MIL-SPEC-inspired bolt engineered for demanding shooters, combining 9310 tool steel construction with salt bath nitride for superior surface hardness, corrosion resistance, and reduced friction, while maintaining rugged reliability under high-pressure handloads and fast, lightweight actions. Fully MIL-SPEC heat treated and shot peened to exacting standards, this bolt is MP-tested through magnetic particle inspection to ensure material soundness and defect-free performance, with back-of-lugs chamfered 45 degrees to promote smooth, reliable cycling even in harsh conditions. Extractors crafted from S7 tool steel are integrated with a precise springs, o-ring, and silicone insert to deliver consistent extraction and reduced risk of carrier binding, making this bolt an ideal upgrade for precision rifles or duty-inspired builds. The black nitride finish not only enhances durability and ease of maintenance but also delivers a low-reflectivity profile suitable for a wide range of environments. Faxons approach blends meticulous engineering with practical field performance, delivering a robust, reliable bolt that supports accurate, repeatable firing in demanding shooting scenarios.