{"product_id":"daniel-defense-m4a1-upper-receiver-group-14-5in-5-56-nato-fde-ris-ii-quad-rail-23-004-13150","title":"Daniel Defense M4A1 Upper Receiver Group 14.5in 5.56 NATO FDE RIS II Quad Rail 23-004-13150","description":"\u003ch2\u003eProduct Description\u003c\/h2\u003e\u003cp\u003eThe Daniel Defense M4A1 Upper Receiver Group is a mission-proven 5.56 NATO upper built around the SOCOM-used M4A1 Rail Interface System (RIS II). Its two-piece, free-floating RIS II quad-rail supports hard-use accessory mounting while keeping the barrel free to maintain accuracy. This complete upper features a 14.5 inch cold hammer forged M4-profile barrel with a permanently attached Daniel Defense extended flash suppressor to achieve a non-NFA 16 inch overall length, plus an included M16-profile bolt carrier group for reliable performance.\u003c\/p\u003e\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRIS II two-piece free-float quad-rail allows robust accessory mounting without affecting barrel harmonics\u003c\/li\u003e\n\u003cli\u003e14.5 inch cold hammer forged M4-profile barrel for durability and consistent accuracy\u003c\/li\u003e\n\u003cli\u003ePinned and welded Daniel Defense extended flash suppressor for 16 inch overall barrel length compliance\u003c\/li\u003e\n\u003cli\u003eIncludes M16-profile bolt carrier group for dependable cycling in hard-use conditions\u003c\/li\u003e\n\u003cli\u003eDesigned to support heavy attachments with a secure bolt-up interface system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Daniel Defense\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e M4A1 Upper Receiver Group\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 5.56x45mm NATO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Length:\u003c\/strong\u003e 14.5 in (16 in overall with pinned and welded extended flash suppressor)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Profile:\u003c\/strong\u003e M4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwist Rate:\u003c\/strong\u003e 1:7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Construction:\u003c\/strong\u003e Cold hammer forged, chrome lined (Chrome Moly Vanadium steel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas System:\u003c\/strong\u003e Carbine length, direct impingement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandguard:\u003c\/strong\u003e Daniel Defense M4A1 RIS II quad-rail (FDE)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Carrier Group:\u003c\/strong\u003e Included, M16 profile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMuzzle Device:\u003c\/strong\u003e Daniel Defense extended flash suppressor, pinned and welded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 815604016612\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 23-004-13150\u003c\/li\u003e\n\u003c\/ul\u003e\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":"Daniel Defense","offers":[{"title":"Default Title","offer_id":44098979168378,"sku":"FLX-DD23-004-13150","price":1611.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/292861979.jpg?v=1771250721","url":"https:\/\/tlooutdoors.com\/products\/daniel-defense-m4a1-upper-receiver-group-14-5in-5-56-nato-fde-ris-ii-quad-rail-23-004-13150","provider":"TLO Outdoors","version":"1.0","type":"link"}