{"product_id":"adv-tech-ar15-castle-nut","title":"ATI Outdoors Advanced Technology AR-15 Castle Nut – Mil-Spec Threading","description":"\u003cp\u003eThe ATI Outdoors Advanced Technology AR-15 Castle Nut secures the buffer tube to the lower receiver and locks the end plate in place. This replacement part is essential for AR-15 builds, repairs, or upgrades when swapping stocks or buffer systems. It ensures proper tension on the receiver extension and prevents loosening during recoil.\u003c\/p\u003e\u003cp\u003eMachined from steel with mil-spec threading, this castle nut features standard staking notches for permanent installation with an end plate. Installation requires a castle nut wrench and armorer's block. Staking the nut after torque is recommended to prevent rotation under heavy use.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Castle Nut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15 Pattern Rifles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreading:\u003c\/strong\u003e Mil-Spec\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-In (Requires Castle Nut Wrench)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e Staking Notches for End Plate\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ATI Outdoors","offers":[{"title":"Default Title","offer_id":47943505740031,"sku":"ADVA5101020","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1240095.jpg?v=1766580680","url":"https:\/\/doublestackstore.com\/products\/adv-tech-ar15-castle-nut","provider":"Double Stack Store","version":"1.0","type":"link"}