{"product_id":"faxon-5-56-9310-bolt-nitride-blk","title":"Faxon Firearms 5.56 9310 Bolt Nitride Black – AR-15 Replacement Bolt","description":"\u003cp\u003eThe Faxon Firearms 5.56 9310 Bolt provides a direct replacement for worn or damaged AR-15 bolts, restoring reliable function to your rifle. Manufactured from high-strength 9310 steel—a common upgrade from standard Carpenter 158 steel—this bolt offers improved fatigue resistance for extended service life. This is a replacement component for shooters performing maintenance, completing builds, or keeping spares on hand.\u003c\/p\u003e\u003cp\u003eThe bolt is finished with salt bath nitride (QPQ) for exceptional hardness and corrosion resistance. Nitride treatment penetrates the steel surface rather than coating it, maintaining tight tolerances while providing a durable, low-friction finish. This is a complete bolt assembly ready for installation into a standard AR-15 bolt carrier. Installation requires basic armorer knowledge and proper headspace verification with go\/no-go gauges before firing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Bolt Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15, 5.56 NATO\/.223 Rem chamberings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 9310 Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Salt Bath Nitride (Black)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Professional Recommended – Requires Headspace Verification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Bolt Assembly (carrier not included)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Faxon Firearms","offers":[{"title":"Default Title","offer_id":47937885339903,"sku":"FXFF556BCNITRIDE","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/4962791.jpg?v=1766499009","url":"https:\/\/doublestackstore.com\/products\/faxon-5-56-9310-bolt-nitride-blk","provider":"Double Stack Store","version":"1.0","type":"link"}