The CMMG Banshee Fixed Upper Group in 9mm (brand part no. 99B160FAB) is built around a 5-inch barrel for one of the most compact 9mm AR platforms on the market, using CMMG’s radial delayed blowback system with a fixed ejector, an advancement over the brand’s original radial delayed blowback design. It’s designed exclusively to run on CMMG Mk17 or mil-spec AR15 lowers using CMMG 9mm conversion magazines, giving builders flexibility in which magazines they run. Every CMMG Banshee upper ships complete with a bolt carrier group and CMMG’s ZEROED accessories, including the ZEROED polymer dust cover, so it’s ready to mount to a compatible lower and run. This upper does not include a lower receiver.

Key Specifications

• Chambered in 9mm.
• 5-inch barrel length.
• Uses CMMG’s radial delayed blowback system with a fixed ejector.
• Designed for CMMG Mk17 or mil-spec AR15 lowers using 9mm conversion magazines.
• Ships complete with a bolt carrier group and CMMG ZEROED accessories.
• Finished in black.

Frequently Asked Questions

Does this upper include a lower receiver? No, it’s a complete upper group only, built for a CMMG Mk17 or mil-spec AR15 lower using CMMG 9mm conversion magazines.

What operating system does it use? CMMG’s radial delayed blowback system with a fixed ejector.

What magazines does this upper use? CMMG 9mm conversion magazines, run through a compatible Mk17 or mil-spec lower.

Buy the CMMG Banshee Fixed 9mm 5in Upper Group

Build one of the most compact 9mm ARs on the market. Order it from our CMMG lineup, part of our AR15 uppers selection, at our Lubbock, Texas gun shop for fast, direct shipping.