{"product_id":"strike-industries-ar-castle-nut-and-extended-end-plate-blue-hardcoat-anodized-steel","title":"Strike Industries AR Castle Nut and Extended End Plate - Blue Hardcoat Anodized Steel","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eStrike Industries AR Castle Nut and Extended End Plate\u003c\/span\u003e\u003c\/strong\u003e combo is an upgraded buffer-tube retention package for the \u003cstrong\u003eAR-platform\u003c\/strong\u003e lower receiver. Machined from \u003cstrong\u003esteel\u003c\/strong\u003e and finished in \u003cstrong\u003eBlue Hardcoat Anodized\u003c\/strong\u003e, this two-piece set replaces the factory castle nut and end plate, supporting more of the receiver extension's threaded area while improving fit and aesthetics at the rear of the lower.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003elengthened castle nut\u003c\/strong\u003e is engineered to match the extended end plate, presenting a longer bearing surface against the receiver extension threads. The \u003cstrong\u003eextended end plate\u003c\/strong\u003e is sized to mirror that added length, keeping the rear of the lower flush while reinforcing the buffer tube retention point. Together, the pair presents a matched, purpose-built appearance versus the stock components.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eA built-in \u003cstrong\u003eQuick-Detach (QD) sling swivel mount\u003c\/strong\u003e is integrated directly into the extended end plate, giving the shooter a dedicated attachment point for push-button QD slings without requiring a separate aftermarket mount or adapter. Installation uses standard AR armorer tools and follows the same castle-nut staking procedure as the factory components, making this a straightforward drop-in upgrade.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eDesigned for use on \u003cstrong\u003eAR-15\u003c\/strong\u003e and compatible AR-platform lower receivers, the Strike Industries castle nut and extended end plate set combines a lengthened steel castle nut, an extended end plate with an integrated QD sling attachment point, and a hardcoat anodized blue finish in one convenient package.\u003c\/span\u003e\u003c\/p\u003e","brand":"Strike Industries","offers":[{"title":"Default Title","offer_id":54991749710146,"sku":"35569","price":54.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_13ceba17-6e48-419f-8706-39b8cac1d216.png?v=1784225820","url":"https:\/\/centerfiresystems.com\/products\/strike-industries-ar-castle-nut-and-extended-end-plate-blue-hardcoat-anodized-steel","provider":"Centerfire Systems","version":"1.0","type":"link"}