{"product_id":"fortis-end-plate-castle-nut","title":"Fortis Manufacturing End Plate \u0026 Castle Nut – AR-15\/AR-10","description":"\u003cp\u003eThe Fortis Manufacturing End Plate \u0026amp; Castle Nut set provides a precision-machined upgrade for securing buffer tubes on AR-15 and AR-10 platforms. This combo replaces standard mil-spec components with hardened steel construction designed for secure, repeatable installations. Shooters building or rebuilding a lower receiver will appreciate the tight tolerances and clean thread engagement that prevent loosening under recoil.\u003c\/p\u003e\u003cp\u003eBoth components are manufactured from hardened steel with a matte black finish for corrosion resistance and low-profile aesthetics. The castle nut features standard staking points for permanent installation. This is a drop-in replacement requiring only a castle nut wrench and staking punch—standard tools for any AR builder or armorer. The end plate accommodates QD sling swivel attachments.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Buffer Tube End Plate \u0026amp; Castle Nut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15, AR-10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Hardened Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Matte Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-In (castle nut wrench and staking punch required)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e (1) End Plate, (1) Castle Nut\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fortis Manufacturing, Inc.","offers":[{"title":"Default Title","offer_id":47937788281087,"sku":"FORTQD-END-CN-COMBO","price":19.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2863442.jpg?v=1766497473","url":"https:\/\/doublestackstore.com\/products\/fortis-end-plate-castle-nut","provider":"Double Stack Store","version":"1.0","type":"link"}