CMMG Banshee 5.7x28mm 8″ Upper Black

The CMMG Banshee 8-inch upper group is a compact, factory-complete assembly chambered in 5.7x28mm intended for PDW-style AR15 builds. It ships with a bolt carrier group and ZEROED accessories and is compatible with CMMG Mk57 lowers or a standard AR15/Mk4 lower when used with CMMG 5.7 AR conversion magazines. The design emphasizes compact handling and parts commonality for modular builds.

Key Specifications

• Chambered in 5.7x28mm.
• Operating system is Radial Delayed Blowback.
• The barrel measures 8 inches.
• The barrel twist rate is 1:9.
• Barrel contour is MT.
• Barrel material is 4140CM SBN.
• The muzzle device is a CMMG ZEROED Linear Compensator.
• Muzzle threads are 1/2 x 28.
• Upper receiver is Billet 6061 T6 Aluminum.
• Hand guard is the CMMG EML7 M-LOK.

Built as a drop-in solution for compact, precision-oriented PDW builds, the Banshee upper group pairs a short-profile barrel and quality components to provide dependable function and adaptable compatibility. Its billet receiver and M-LOK handguard support a variety of accessory configurations while the included ZEROED components simplify initial setup.