{"product_id":"cmmg-resolute-mk4-6-5-grendel-16-1-complete-upper-group-armor-black","title":"CMMG Resolute MK4 6.5 Grendel 16.1\" Complete Upper Group - Armor Black","description":"\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe \u003cstrong\u003e\u003cspan style=\"background-color: #ffff00;\"\u003eCMMG Resolute MK4\u003c\/span\u003e\u003c\/strong\u003e \u003cstrong\u003eComplete Upper Group\u003c\/strong\u003e is purpose-built around the \u003cstrong\u003e6.5 Grendel\u003c\/strong\u003e cartridge, delivering flat-shooting, long-range-capable performance from a familiar AR-15 footprint. Built on CMMG's proven \u003cstrong\u003eMk4 platform\u003c\/strong\u003e, this complete upper is engineered to drop onto any standard \u003cstrong\u003eAR-15 lower receiver\u003c\/strong\u003e, turning a host lower into a hard-hitting medium- to long-range rifle.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eAt the core of the Resolute MK4 is a \u003cstrong\u003e16.1\" barrel\u003c\/strong\u003e machined from \u003cstrong\u003e4140CM steel\u003c\/strong\u003e with a \u003cstrong\u003e1:8 twist\u003c\/strong\u003e rate and a medium-taper contour - a combination optimized to stabilize the full range of \u003cstrong\u003e6.5 Grendel\u003c\/strong\u003e bullet weights. The barrel is finished with CMMG's signature \u003cstrong\u003eRadial Brake\u003c\/strong\u003e muzzle device, which helps tame recoil and keep the optic on target during follow-up shots.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eThe upper receiver is forged from \u003cstrong\u003e7075-T6 aluminum\u003c\/strong\u003e in a classic \u003cstrong\u003eM4-type\u003c\/strong\u003e profile and coated in \u003cstrong\u003eCerakote Armor Black\u003c\/strong\u003e for a durable, corrosion-resistant, and non-reflective finish. A free-float \u003cstrong\u003eM-LOK handguard\u003c\/strong\u003e surrounds the barrel, providing a lightweight, modular platform for mounting accessories such as lights, lasers, bipods, and forward grips.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"font-size: 14pt;\"\u003eRunning a time-tested \u003cstrong\u003edirect impingement\u003c\/strong\u003e gas system, the Resolute MK4 upper delivers the reliability and controls AR-15 shooters expect. It installs on any mil-spec AR-15 lower receiver group and ships ready to pin and go. The complete upper group measures \u003cstrong\u003e25\"\u003c\/strong\u003e overall and weighs approximately \u003cstrong\u003e4.3 lbs\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e","brand":"CMMG","offers":[{"title":"Default Title","offer_id":55292779462978,"sku":"64BCF88AB","price":839.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/7921\/5682\/files\/alt_40b8988e-3a74-476c-a3b9-3d84e5d66013.jpg?v=1785103533","url":"https:\/\/centerfiresystems.com\/products\/cmmg-resolute-mk4-6-5-grendel-16-1-complete-upper-group-armor-black","provider":"Centerfire Systems","version":"1.0","type":"link"}