{"product_id":"andro-corp-industries-u556103ml-5-56-nato-10-3-m-lok-complete-upper","title":"Andro Corp Industries U556103ML 5.56 NATO 10.3\" M-LOK Complete Upper","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eAndro Corp Industries U556103ML\u003c\/span\u003e\u003c\/strong\u003e is a complete \u003cstrong\u003e5.56x45mm NATO\u003c\/strong\u003e AR-15 upper receiver assembly built around a compact \u003cstrong\u003e10.3\" barrel\u003c\/strong\u003e, making it a turnkey platform for short-barrel rifle and AR-pistol builds. The barrel is machined from \u003cstrong\u003e4150 Chrome Moly Vanadium steel\u003c\/strong\u003e with a \u003cstrong\u003eMelonite\u003c\/strong\u003e treatment and finished in corrosion-resistant \u003cstrong\u003eQPQ\u003c\/strong\u003e black.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe bore features a \u003cstrong\u003e1:7 twist rate\u003c\/strong\u003e to stabilize a wide range of bullet weights, \u003cstrong\u003eM4 feed ramps\u003c\/strong\u003e for reliable feeding, and is threaded \u003cstrong\u003e1\/2x28\u003c\/strong\u003e to accept the included \u003cstrong\u003eA2 flash hider\u003c\/strong\u003e or any compatible muzzle device. Up front, the upper is paired with a slim free-float \u003cstrong\u003eM-LOK handguard\u003c\/strong\u003e that delivers plenty of real estate for accessories, lights, lasers, and grips without adding bulk.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eInternally, the upper uses a \u003cstrong\u003ecarbine-length gas system\u003c\/strong\u003e fed through a low-profile \u003cstrong\u003e.750\" gas block\u003c\/strong\u003e for smooth cycling with the included \u003cstrong\u003eM16 bolt carrier group\u003c\/strong\u003e. Overall length measures \u003cstrong\u003e18.75\"\u003c\/strong\u003e, keeping the package compact and maneuverable. The \u003cstrong\u003eU556103ML\u003c\/strong\u003e drops onto any mil-spec AR-15 lower receiver to deliver a compact \u003cstrong\u003e5.56 NATO\u003c\/strong\u003e upper ready for pistol, SBR, or compact rifle builds.\u003c\/span\u003e\u003c\/p\u003e","brand":"Andro Corp Industries","offers":[{"title":"Default Title","offer_id":55084192137538,"sku":"199064","price":330.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/hires_4a3ea75b-e335-405b-9b1a-1aa882c84a37.png?v=1784768783","url":"https:\/\/centerfiresystems.com\/products\/andro-corp-industries-u556103ml-5-56-nato-10-3-m-lok-complete-upper","provider":"Centerfire Systems","version":"1.0","type":"link"}