CMMG Banshee Fixed Upper Group — 9mm 5in

The CMMG Banshee fixed upper group is a compact 9mm radial delayed blowback upper designed for use with CMMG MkGs, Mk17, or mil‑spec AR15 lowers and CMMG 9mm conversion magazines. It ships complete with a CMMG ZEROED bolt carrier group and ZEROED accessories, including an ambidextrous charging handle and a linear compensator. The design emphasizes compact handling and compatibility for pistol‑caliber AR builds and range or training applications.

Key Specifications

• The upper is chambered for 9mm.
• The operating system is Fixed Ejector Radial Delayed Blowback.
• The barrel length is 5 inches.
• The barrel twist is 1:10.
• 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 handguard is a CMMG EML4 M-LOK.
• The finish is Cerakote Standard.

Configured to integrate with CMMG conversion components and mil‑spec AR15 lowers, the Banshee fixed 9mm upper provides a compact, well‑specified option for pistol‑caliber AR builds. Its combination of a billet receiver, M‑LOK handguard, and CMMG ZEROED accessories makes it suitable for range use, training, and compact carbine applications where reliability and clean integration matter.