CMMG Resolute Upper Group 9mm 16.1" Black 99BA20FAB – Complete 9mm AR-15 Upper Receiver Assembly
The CMMG Resolute Upper Group 9mm 16.1" Black 99BA20FAB is a premium, complete upper receiver assembly designed for the CMMG Resolute platform. Chambered in 9mm Luger, this upper features a 16.1-inch barrel and is finished in a durable black coating. Built with CMMG’s innovative Radial Delayed Blowback operating system, this 9mm upper delivers smooth cycling, reduced recoil, and exceptional reliability. Whether you are building a custom 9mm AR-15 rifle, upgrading an existing lower receiver, or assembling a dedicated pistol-caliber carbine, the CMMG Resolute 9mm Upper Group provides a high-quality, ready-to-install solution.
Engineered with precision components and CMMG’s signature attention to detail, this upper receiver group offers shooters a reliable and accurate 9mm platform that pairs perfectly with standard AR-15 lower receivers using Glock or CMMG 9mm magazines.
Key Features of the CMMG Resolute 9mm 16.1" Upper Receiver
16.1-Inch Barrel
Longer 16.1" barrel provides increased velocity and improved accuracy compared to shorter 9mm barrels while remaining compact.
Radial Delayed Blowback
CMMG’s patented Radial Delayed Blowback system offers smoother operation and significantly reduced recoil compared to traditional blowback 9mm uppers.
Complete Upper Assembly
Includes upper receiver, bolt carrier group, barrel, handguard, and muzzle device — ready to install on any standard AR-15 lower.
Black Finish
Durable black coating provides excellent corrosion resistance and a professional, tactical appearance.
Suppressor Ready
Threaded barrel allows for easy attachment of suppressors, making it ideal for quiet shooting and reduced recoil.
AR-15 Compatibility
Designed to work with standard AR-15 lower receivers using Glock-pattern or CMMG 9mm magazines.
Why Choose the CMMG Resolute 9mm 16.1" Upper Group?
The CMMG Resolute Upper Group 9mm 16.1" is an excellent choice for shooters looking to build a reliable and accurate 9mm AR-15 style rifle. CMMG’s Radial Delayed Blowback technology sets this upper apart from standard blowback-operated 9mm uppers. This system delays the opening of the bolt, resulting in smoother cycling, reduced felt recoil, and improved reliability — especially when running suppressed. The 16.1-inch barrel strikes an ideal balance between velocity and overall length. While shorter barrels are popular for pistol builds, the 16.1" length provides noticeably better ballistic performance and accuracy, making it well-suited for home defense, range use, and even some competition applications. The complete upper assembly saves time and ensures all components are properly matched and headspaced from the factory. This upper is compatible with most standard AR-15 lower receivers, allowing builders to create a dedicated 9mm rifle using affordable and widely available Glock magazines or CMMG’s own 9mm magazines. The black finish offers a clean, professional look while protecting the components from the elements. Whether you are building a new 9mm carbine from the ground up or upgrading an existing platform, the CMMG Resolute 9mm Upper Group delivers the performance, quality, and innovation that CMMG is known for. Its combination of the Radial Delayed Blowback system, quality barrel, and complete assembly makes it one of the best 9mm upper options available for custom builders and enthusiasts.
Technical Specifications
| Specification | Details |
|---|
| Brand | CMMG |
| Model | Resolute Upper Group |
| Model Number | 99BA20FAB |
| UPC | 840442505646 |
| Caliber | 9mm Luger |
| Barrel Length | 16.1 Inches |
| Operating System | Radial Delayed Blowback |
| Finish | Black |
| Configuration | Complete Upper Receiver Group |
| Compatibility | Standard AR-15 Lower Receivers (Glock & CMMG 9mm Mags) |
| Best For | Custom 9mm AR Builds, Home Defense, Suppressed Shooting, Range Use |
Shop the CMMG Resolute 9mm Upper Today!
The CMMG Resolute Upper Group 9mm 16.1" Black 99BA20FAB (UPC 840442505646) is a complete 9mm upper receiver assembly featuring a 16.1-inch barrel and CMMG’s Radial Delayed Blowback operating system. Finished in black, this upper is designed to pair with standard AR-15 lower receivers and is compatible with Glock and CMMG 9mm magazines. Ideal for custom 9mm AR builds, the CMMG Resolute 9mm Upper Group offers smooth operation, reduced recoil, and excellent reliability for home defense, suppressed shooting, and recreational use.
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