CMMG Banshee AR Upper receiver in 9mm caliber, 5" barrel, Black, 

Fits on to any standard AR15 lower receiver

Includes

  • 3x AR15 - 9mm PMAG, 30 rd
  • Bolt Carrier Group - Radial Delay Blockback System
  • Radian Raptor CMMG Charging handle

Radial Delay Blowback system

Radial delayed blowback was an advancement from straight blowback. Compact action radial delayed blowback was an advancement to the original radial delayed blowback. This (fixed ejector on radial delayed blowback) is a continued advancement bringing new technologies to the original platform.

If you’re looking to build the most compact 9mm AR then look no further. CMMG®’s 9mm radial delayed blowback uppers feature uncompromised design and engineering with styling that is never mistaken for something else. Having more options is always better, like what magazines you would like to use. 9mm Radial Delayed Blowback uppers are designed exclusively to work with CMMG MkGs, Mk17, or mil-spec AR15 lowers using our 9mm Conversion Magazines. Available in different Cerakote finishes, all CMMG® Upper Groups come complete with bolt carrier group and ZEROED™ accessories including:

Radial Delayed Blowback™ Operating System

Originally developed for the .45 ACP MkG platform, CMMG has adapted our Radial Delayed Blowback system across our pistol caliber lineup to create pistols and rifles with a softer recoil impulse and reduced bolt weight compared to traditional straight blowback systems. Check out our CMMG Resources article & video to learn more about what sets Radial Delayed Blowback apart. With the wide range in ammunition available, and the option for suppressed operation, the available Action Tuning Kit will allow you to tune your system even more for added flexibility and smoother operation.