CMMG BANSHEE UPPER GROUP FIXED | 9mm | 5

The CMMG BANSHEE Upper Group Fixed is a 9mm radial delayed blowback upper designed for compact AR-style builds. It ships complete with a ZEROED bolt carrier group and ZEROED accessories including a polymer dust cover, ambidextrous charging handle, and linear compensator. Built for use on CMMG MkGs, Mk17 or mil-spec AR15 lowers with CMMG 9mm conversion magazines, this upper focuses on compactness and controlled operation for pistol-caliber AR platforms. Typical applications include range training and pistol-caliber carbine competition.

Product Specifications

• The platform is Mk4 Mk9 Mk17 MkGs.
• The caliber is 9mm.
• The operating system is Fixed Ejector Radial Delayed Blowback.
• The barrel length is listed as 5.
• The barrel twist is 1:10.
• The barrel contour is MT.
• The barrel material is 4140CM SBN.
• The muzzle device is a CMMG ZEROED Linear Compensator.
• The muzzle thread is 1/2 X 28.
• The upper receiver is Billet 6061 T6 Aluminum.
• The hand guard is a CMMG EML4 M-LOK.
• The finish is Cerakote Standard.
• The charging handle is CMMG ZEROED Ambi.
• The overall length is 13.7.
• The UPC is 840442505714.

This upper group assembles CMMG engineering into a compact, factory-configured 9mm option suitable for shooters who prioritize a small footprint and proven components. Its radial delayed blowback system and dedicated 9mm design make it a straightforward choice for building a pistol-caliber AR for range work or competition use.