{"product_id":"guntec-usa-ar-15-wide-castle-nut-extreme-duty-steel-black-nitride","title":"Guntec USA AR-15 Wide Castle Nut Extreme Duty - Steel Black Nitride","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eGuntec USA AR-15 Wide Castle Nut\u003c\/span\u003e\u003c\/strong\u003e is a heavy-duty, US-made \u003cstrong\u003esteel\u003c\/strong\u003e castle nut purpose-built to lock down a carbine or M4 buffer tube on an AR-15 lower receiver. The \u003cstrong\u003eextreme duty\u003c\/strong\u003e wide-body geometry gives builders extra contact surface and added strength over a standard castle nut, making it a smart upgrade for hard-use carbines and any rifle that sees a lot of abuse.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eMachined from \u003cstrong\u003esteel\u003c\/strong\u003e and treated with a corrosion-resistant \u003cstrong\u003enitride\u003c\/strong\u003e finish in matte \u003cstrong\u003eblack\u003c\/strong\u003e, this castle nut is built to resist wear and the elements. The wide profile seats solidly against the buffer tube flange for a more secure lockup under recoil, and the nut is compatible with both \u003cstrong\u003emil-spec\u003c\/strong\u003e and \u003cstrong\u003ecommercial-spec\u003c\/strong\u003e M4\/carbine buffer tubes.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eInstallation is straightforward with any standard castle-nut wrench or AR-15 armorer's wrench. Whether you are assembling a new build, replacing a worn OEM nut, or stepping up a workhorse carbine, this \u003cstrong\u003eMade in USA\u003c\/strong\u003e castle nut delivers the strength and fit a serious AR-15 build demands.\u003c\/span\u003e\u003c\/p\u003e","brand":"Guntec USA","offers":[{"title":"Default Title","offer_id":55342538785090,"sku":"ZCASTLEEXD","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/alt_e4a46e85-0be7-41aa-9987-71b6ba88edf4.jpg?v=1785179922","url":"https:\/\/centerfiresystems.com\/products\/guntec-usa-ar-15-wide-castle-nut-extreme-duty-steel-black-nitride","provider":"Centerfire Systems","version":"1.0","type":"link"}