Faxon Firearms Bolt 5.56 NATO Fits AR-15 – Nitride, 9310 Steel (FF556BCNITRIDE)

• 5.56 NATO bolt designed for AR-15 rifles with reliable cycling performance
• 9310 tool steel construction with full MIL-SPEC heat treatment and shot peening
• Salt bath nitride finish improves surface hardness and corrosion resistance
• Magnetic particle inspected bolt ensures material integrity and durability
• Chamfered bolt lugs enhance feeding reliability under high pressure conditions
• Includes spring insert and Crane O-ring for consistent extractor tension

The Faxon Firearms Bolt 556NATO Fits AR-15 Nitride Finish Black is a rifle bolt designed for cycling and locking functions in AR-15 platforms. This Faxon Firearms bolt is chambered for 5.56 NATO and constructed from 9310 tool steel with a nitride finish.

The bolt is fully heat treated to MIL-SPEC standards and undergoes magnetic particle inspection for material verification. It includes a spring, insert, and Crane O-ring assembly along with an S7 tool steel extractor. The lugs are chamfered at 45 degrees and the surface is salt bath nitrided. In practical use, this bolt interfaces with AR-15 bolt carrier groups and barrels to support chambering and extraction cycles, making it suitable for rifle maintenance or replacement in standard AR-15 configurations.