{"product_id":"cmmg-resolute-mk4-complete-ar-15-upper-receiver-6mm-advanced-rifle-cartridge-16-1in-60b1091-ab","title":"CMMG Resolute MK4 Complete AR-15 Upper Receiver 6mm Advanced Rifle Cartridge 16.1in 60B1091-AB","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eBuilt for shooters who want extended-range performance from an AR-15 platform, the CMMG RESOLUTE MK4 complete upper receiver group is chambered in 6mm Advanced Rifle Cartridge (6mm ARC) and features a 16.1-inch barrel for a balanced blend of accuracy and handling. Designed to pair with a standard AR-15 lower, this complete upper assembly is engineered for durable, long-term reliability and finished in Armor Black Cerakote for enhanced wear and corrosion resistance. With quality components like a flat-top (A3) upper, M-LOK handguard, and a factory-installed muzzle brake, it’s an excellent choice for precision target shooting and hunting-style builds.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Highlights\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eChambered in 6mm ARC for excellent external ballistics and effective long-range performance.\u003c\/li\u003e\n  \u003cli\u003e16.1-inch barrel with 1:7.5 twist to support modern 6mm projectile selection.\u003c\/li\u003e\n  \u003cli\u003eArmor Black Cerakote finish on the receiver\/handguard for added durability and corrosion protection.\u003c\/li\u003e\n  \u003cli\u003eComplete upper assembly designed to fit standard AR-15 lowers for an easy caliber upgrade.\u003c\/li\u003e\n  \u003cli\u003eModern accessory-ready configuration with CMMG EML15 M-LOK handguard and flat-top receiver.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecs\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CMMG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 60B1091-AB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 810097504660\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlatform Compatibility:\u003c\/strong\u003e AR-15\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChambering:\u003c\/strong\u003e 6mm Advanced Rifle Cartridge (6mm ARC)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Length:\u003c\/strong\u003e 16.1 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Material:\u003c\/strong\u003e 416 Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Finish:\u003c\/strong\u003e Black Salt Bath Nitride\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwist Rate:\u003c\/strong\u003e 1:7.5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMuzzle Threads:\u003c\/strong\u003e 5\/8\"-24\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas System Length:\u003c\/strong\u003e Rifle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas Block Diameter:\u003c\/strong\u003e 0.750 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUpper Receiver Type:\u003c\/strong\u003e A3 Flat-Top\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUpper Receiver Material:\u003c\/strong\u003e Billet 6061-T6 Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandguard:\u003c\/strong\u003e CMMG EML15 M-LOK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMuzzle Device:\u003c\/strong\u003e CMMG ZEROED Muzzle Brake\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Bolt carrier assembly; ambidextrous charging handle; polymer dust cover\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\/Color:\u003c\/strong\u003e Cerakote, Armor Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.3 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 25 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States of America\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\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":"CMMG","offers":[{"title":"Default Title","offer_id":44077316571258,"sku":"FLX-CMMG60B1091-AB","price":960.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/283688128.jpg?v=1767662879","url":"https:\/\/tlooutdoors.com\/products\/cmmg-resolute-mk4-complete-ar-15-upper-receiver-6mm-advanced-rifle-cartridge-16-1in-60b1091-ab","provider":"TLO Outdoors","version":"1.0","type":"link"}