{"product_id":"armaspec-self-retention-castle-nut-7075-t6-aluminum-fde-ar-15-m4","title":"Armaspec Self-Retention Castle Nut 7075-T6 Aluminum FDE AR-15\/M4","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eArmaspec Self-Retention Castle Nut\u003c\/span\u003e\u003c\/strong\u003e is a drop-in upgrade for the standard mil-spec castle nut on \u003cstrong\u003eAR-15 and M4\u003c\/strong\u003e buffer tubes. It uses \u003cstrong\u003epatented thread-locking technology\u003c\/strong\u003e that holds the nut in place once torqued to spec - \u003cstrong\u003eno staking or thread locker required\u003c\/strong\u003e - so the loose castle nut problem common to carbine buffer assemblies is solved without the extra fabrication step.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eMachined from \u003cstrong\u003epremium 7075-T6 aluminum\u003c\/strong\u003e for an excellent strength-to-weight ratio, the nut is finished in a rugged \u003cstrong\u003ehardcoat anodized Flat Dark Earth\u003c\/strong\u003e coating that resists wear and corrosion through high round counts. It is a direct-fit replacement for mil-spec castle nuts on standard buffer tubes and end plates, making installation a straightforward swap during a build or routine service.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eWhether you're assembling a new carbine or chasing down a loose factory nut, the Armaspec Self-Retention Castle Nut delivers a simple, \u003cstrong\u003emade in the USA\u003c\/strong\u003e solution that stays put shot after shot.\u003c\/span\u003e\u003c\/p\u003e","brand":"Armaspec","offers":[{"title":"Default Title","offer_id":55076791157058,"sku":"195426","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_f3f4ab62-c4f5-47e0-9811-f0df66e939e7.png?v=1784756779","url":"https:\/\/centerfiresystems.com\/products\/armaspec-self-retention-castle-nut-7075-t6-aluminum-fde-ar-15-m4","provider":"Centerfire Systems","version":"1.0","type":"link"}