{"product_id":"strike-enhncd-castle-nut-w-qd-blk","title":"Strike Industries Enhanced Castle Nut with QD Mount – AR-15\/AR-10","description":"\u003cp\u003eThe Strike Industries Enhanced Castle Nut replaces the standard AR-pattern castle nut with a low-profile design that integrates a quick-detach (QD) sling swivel socket. This allows shooters to add a rear sling attachment point without installing a separate endplate adapter or bulky QD mount. The integrated QD socket sits flush when not in use, maintaining a clean receiver profile while providing a secure, rotation-limited sling connection when needed.\u003c\/p\u003e\u003cp\u003eMachined from steel with a black oxide finish for corrosion resistance. Features a castellated design that accepts standard AR buffer tube staking. Installation requires an AR-15 armorer's wrench and follows the same process as a standard castle nut. Torque to manufacturer specifications and stake properly to prevent loosening under recoil.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Castle Nut with Integrated QD Socket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Firearms:\u003c\/strong\u003e AR-15, AR-10, and other AR-pattern rifles with mil-spec buffer tubes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Requires AR Armorer's Wrench and Staking Tool\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Enhanced Castle Nut\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Strike Industries","offers":[{"title":"Default Title","offer_id":47940641227007,"sku":"SI-AR-ECN-EEP-BK","price":60.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2875965.jpg?v=1766563337","url":"https:\/\/doublestackstore.com\/products\/strike-enhncd-castle-nut-w-qd-blk","provider":"Double Stack Store","version":"1.0","type":"link"}