{"product_id":"dd-m4a1-upper-urg-14-5pb-556-fde","title":"Daniel Defense M4A1 Complete Upper Receiver 5.56 NATO 14.5\" Pinned\/Welded FDE","description":"\u003cp\u003eThe Daniel Defense M4A1 Upper Receiver delivers a factory-assembled 5.56 NATO configuration with a 14.5-inch cold hammer-forged barrel, pinned and welded muzzle device to meet the 16-inch legal requirement. Finished in Mil-Spec+ Cerakote FDE, this upper drops onto any mil-spec AR-15 lower receiver. The M4A1 profile barrel features a 1:7 twist rate optimized for 62-77 grain projectiles and a carbine-length gas system for reliable function with standard and suppressed fire.\u003c\/p\u003e\u003cp\u003eMachined from 7075-T6 aluminum with a Type III hard-coat anodized upper receiver and Daniel Defense's proprietary Cerakote finish on external components. Upper includes a pinned low-profile gas block, Daniel Defense bolt carrier group, charging handle, and RIS II M-LOK handguard. No sights included. Installation requires only standard AR-15 lower receiver pins—no gunsmithing needed.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 5.56 NATO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Complete Upper Receiver Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Lower:\u003c\/strong\u003e Mil-Spec AR-15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Length:\u003c\/strong\u003e 14.5\" (pinned\/welded to 16\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwist Rate:\u003c\/strong\u003e 1:7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 7075-T6 Aluminum Upper, Cold Hammer-Forged Barrel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Mil-Spec+ FDE Cerakote\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e BCG, Charging Handle, RIS II M-LOK Handguard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-in, No Gunsmithing Required\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daniel Defense","offers":[{"title":"Default Title","offer_id":47937253245183,"sku":"DD23-004-13150","price":1686.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/1251219.jpg?v=1766483668","url":"https:\/\/doublestackstore.com\/products\/dd-m4a1-upper-urg-14-5pb-556-fde","provider":"Double Stack Store","version":"1.0","type":"link"}