{"product_id":"tacfire-ar-15-buffer-tube-castle-nut-black-steel-mil-spec-locking-nut-mar039","title":"TacFire AR-15 Buffer Tube Castle Nut, Black Steel Mil-Spec Locking Nut MAR039","description":"\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eThe TacFire MAR039 castle nut is a steel, black-finished locking nut designed for AR-15 carbine buffer tube assemblies. It is used to secure and tighten the receiver extension (buffer tube) to the lower receiver, helping maintain a stable and reliable stock\/buffer tube setup. Built for straightforward installation, it’s a practical replacement or build component for .223\/5.56 AR-15 platforms.\u003c\/p\u003e\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSteel construction with a black finish for durable AR-15 buffer tube assembly use\u003c\/li\u003e\n  \u003cli\u003eCastle locking nut design helps securely retain the receiver extension (buffer tube) to the receiver\u003c\/li\u003e\n  \u003cli\u003eCompatible with .223\/5.56 AR-15 carbine stock\/buffer tube setups\u003c\/li\u003e\n  \u003cli\u003eDesigned to meet Mil-Spec fit standards for dependable integration\u003c\/li\u003e\n  \u003cli\u003eCompact, lightweight component ideal for new builds or replacement parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e TacFire\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e MAR039\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 811261021914\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e AR-15 castle nut \/ buffer tube locking nut\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 1.375 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNet Weight:\u003c\/strong\u003e 0.5 oz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatibility (as listed):\u003c\/strong\u003e AR-15 .223\/5.56 carbine buffer tubes; fits commercial and Mil-Spec buffer tubes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product’s manufacturer.\u003c\/em\u003e\u003c\/p\u003e","brand":"TacFire","offers":[{"title":"Default Title","offer_id":44078116733050,"sku":"FLX-146753","price":12.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/284769263.png?v=1767977584","url":"https:\/\/tlooutdoors.com\/products\/tacfire-ar-15-buffer-tube-castle-nut-black-steel-mil-spec-locking-nut-mar039","provider":"TLO Outdoors","version":"1.0","type":"link"}