{"product_id":"radical-uppr-556-16-1-7-mlok-blk","title":"Radical Firearms 5.56 NATO Upper Receiver Assembly 16\" 1:7 Twist M-LOK – AR-15 Compatible","description":"\u003cp\u003eThis Radical Firearms complete upper receiver assembly is chambered in 5.56 NATO and built for AR-15 pattern lowers. The 16-inch barrel features a 1:7 twist rate optimized for heavier projectiles in the 62-77 grain range, making it well-suited for duty, tactical training, or hunting with modern ammunition loads. The M-LOK handguard provides low-profile mounting options for accessories without added bulk.\u003c\/p\u003e\u003cp\u003eThe upper is machined from forged 7075-T6 aluminum with a black hardcoat anodized finish. It comes fully assembled with barrel, gas system, handguard, and bolt carrier group installed. This is a drop-in unit that requires only attachment to a mil-spec AR-15 lower receiver. Verify headspace and function before live fire use, as with any upper\/lower pairing.\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 AR-15 \/ mil-spec lower receivers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel Length:\u003c\/strong\u003e 16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwist Rate:\u003c\/strong\u003e 1:7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandguard:\u003c\/strong\u003e M-LOK compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Forged 7075-T6 aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black hardcoat anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e Assembled upper with BCG and charging handle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Attaches to mil-spec AR-15 lower receiver\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radical Firearms","offers":[{"title":"Default Title","offer_id":47939021406463,"sku":"RAFRF00325","price":332.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2872265.jpg?v=1766538561","url":"https:\/\/doublestackstore.com\/products\/radical-uppr-556-16-1-7-mlok-blk","provider":"Double Stack Store","version":"1.0","type":"link"}