{"product_id":"cmmg-resolute-100-upper-group-mk4-5-56x45mm-bcg-included-m-lok-handguard-cmm55bc761","title":"CMMG Resolute 100 Upper Group MK4 5.56x45mm BCG Included M-Lok Handguard CMM55BC761","description":"\u003ch2\u003eCMMG Resolute 100 Upper Group MK4 5.56x45mm\u003c\/h2\u003e\n\u003cp\u003eThe CMMG Resolute 100 Upper Group for the MK4 platform in 5.56x45mm is purpose-built for shooters who demand reliability and performance without compromise. Engineered as a complete upper group, it ships with the bolt carrier group (BCG) included, making it a ready-to-install solution for your MK4 lower receiver. The 16.1-inch barrel is crafted from 4140 Chrome Moly steel with a Salt Bath Nitride (SBN) finish, delivering outstanding corrosion resistance and long-term durability with a fast 1:7 twist rate optimized for stabilizing modern 5.56x45mm projectiles. The CMMG RML15 M-Lok handguard provides a slim, ergonomic profile along with ample attachment points for accessories, while the hard coat anodized finish on both the forged 7075-T6 aluminum receiver and handguard ensures lasting protection in the field or at the range. The Resolute 100 is the ideal foundation for a capable, no-nonsense AR-15-pattern rifle.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Highlights\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Upper Group with BCG Included:\u003c\/strong\u003e Ships ready to pair directly with a compatible lower receiver, saving time and ensuring proven compatibility.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e16.1\" 4140 Chrome Moly Barrel with Salt Bath Nitride Finish:\u003c\/strong\u003e Provides exceptional durability, corrosion resistance, and consistent accuracy with a 1:7 twist rate.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCMMG RML15 M-Lok Handguard:\u003c\/strong\u003e A free-float M-Lok design that reduces overall weight while offering versatile and modular accessory mounting options.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForged 7075-T6 Aluminum Receiver with Hard Coat Anodize:\u003c\/strong\u003e Delivers maximum structural strength and wear resistance for demanding use in any condition.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMid-Length Gas System and A2 Compensator:\u003c\/strong\u003e Promotes smooth, reliable cycling and features a standard 1\/2-28 threaded muzzle for aftermarket device upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CMMG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e CMM55BC761\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 816422026562\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaliber:\u003c\/strong\u003e 5.56x45mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Length:\u003c\/strong\u003e 16.1\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Twist:\u003c\/strong\u003e 1:7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Profile:\u003c\/strong\u003e Medium Taper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Material:\u003c\/strong\u003e 4140 Chrome Moly (4140CM)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBarrel Finish:\u003c\/strong\u003e Salt Bath Nitride (SBN)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMuzzle Device:\u003c\/strong\u003e A2 Comp, threaded 1\/2-28\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas Port Location:\u003c\/strong\u003e Mid Length\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReceiver:\u003c\/strong\u003e Forged 7075-T6 Aluminum, M4 Type Upper, Complete with BCG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandguard:\u003c\/strong\u003e CMMG RML15 M-Lok\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Hard Coat Anodized (Receiver and Handguard)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharging Handle:\u003c\/strong\u003e CMMG Mil-Spec\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4 lbs 5 oz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 25.2\"\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":44134688391290,"sku":"FLX-CMM55BC761","price":652.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1679\/0365\/files\/308992453.jpg?v=1781057061","url":"https:\/\/tlooutdoors.com\/products\/cmmg-resolute-100-upper-group-mk4-5-56x45mm-bcg-included-m-lok-handguard-cmm55bc761","provider":"TLO Outdoors","version":"1.0","type":"link"}