CMMG Banshee MK4 Upper .22 LR 4.5in Armor Black

The CMMG Banshee MK4 Upper Group is a .22 LR upper built on the Mk4 platform with a 4.50" barrel intended for use with standard AR-15 lower groups. It is designed to use CMMG .22 AR conversion magazines and ships complete with bolt carrier group and ZEROED accessories. Packaging includes a ZEROED AR15 polymer dust cover, ZEROED .22LR ambidextrous charging handle, and a ZEROED .22LR flash hider.

Key Specifications

• The barrel measures 4.50".
• Chambered for .22 LR.
• The barrel twist rate is 1:16.
• The barrel material is 4140CM SBN.
• The barrel contour is MT.
• The muzzle threads are 1/2 x 28.
• Includes a CMMG ZEROED Flash Hider.
• The operating system is Traditional Blowback.
• The upper receiver is Billet 6061 T6 Aluminum.
• The handguard is a CMMG EML4 M-LOK in Armor Black finish.

Purpose-built for economical range work and training, the Banshee MK4 upper group integrates CMMG's .22 LR platform features into a compact, AR-compatible package. Its short 4.50" barrel and traditional blowback operation make it suitable for low-cost practice and conversion use while maintaining compatibility with standard AR-15 lowers and CMMG conversion mags. The included ZEROED components simplify setup and provide a complete upper ready for installation.