CMMG Banshee 5.7x28mm 8" Upper Group
Complete 8-inch upper group for building a compact personal defense rifle. Features CMMG's Radial Delayed Blowback operating system, includes bolt carrier group and ZEROED accessories. Compatible with CMMG Mk57 or standard AR15 lowers.
Fits: AR15
The Modern Personal Defense Rifle
The CMMG Banshee 5.7x28mm upper group represents a thoughtful approach to compact rifle design. This caliber has earned its place in the personal defense weapon category through superior ballistics and notably reduced recoil compared to traditional pistol-caliber alternatives.
What You Get
This complete upper assembly includes everything needed to build a functional PDW:
- 8-inch barrel optimized for 5.7x28mm performance
- Radial Delayed Blowback operating system for reliable cycling and reduced impulse
- Bolt carrier group ready to function
- ZEROED accessories package featuring:
- Polymer dust cover
- Ambidextrous charging handle
- Linear compensator
Compatibility and Flexibility
The upper group works with CMMG Mk57 dedicated lowers or standard AR15/Mk4 lowers when paired with CMMG 5.7 conversion magazines. This flexibility allows you to build exactly the platform you envision.
Finish Options
Available in six Cerakote finishes to match your preferences and operational needs.
Quality Assurance
Backed by CMMG's lifetime quality guarantee, reflecting the manufacturer's confidence in their engineering and materials.
