CMMG Resolute upper in .22 ARC with a 16.10″ barrel, 15″ M-LOK handguard and 7075‑T6 aluminum construction. Designed for AR‑15 Mk4 platform performance and 22 ARC ballistics.
The CMMG Resolute 28B260CAB is an AR‑15 compatible upper built for the .22 ARC cartridge. It pairs a 16.10″ barrel with a 15″ M‑LOK handguard and uses 7075‑T6 aluminum construction where specified in the product name. This upper is intended to deliver the ballistic performance associated with .22 ARC in the Mk4 AR‑15 lineup while maintaining parts compatibility with standard AR‑15 components.
Product Specifications
The manufacturer is CMMG.
The model/part number is 28B260CAB.
The caliber is .22 ARC.
The barrel measures 16.10 inches.
The barrel material is 4140 Steel.
The handguard type and length is 15″ M-LOK.
The listed receiver material in the product name is 7075-T6 Aluminum.
The rate of twist is 1:7.
The product is categorized as AR15 Uppers.
The item is designed for use on the AR‑15 (Mk4) platform.
The product description states it delivers 22-250 levels of ballistic performance in the Mk4 lineup.
The UPC is 810148627324.
This Resolute upper provides a focused solution for shooters seeking .22 ARC performance in an AR‑15 form factor. Its combination of a 16.10″ 4140 steel barrel, 15″ M‑LOK handguard, and the construction details listed in the product name make it suitable for precision varmint work and range training where the .22 ARC’s ballistics are desired. The upper integrates into standard AR‑15 systems to maintain familiar ergonomics and accessory options.
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