CMMG Banshee MK4 Upper Group .22 LR 4.5″

Description

The CMMG Banshee MK4 upper group is a .22 LR rimfire upper built on the Mk4 platform and designed to work with any standard AR-15 lower group. It ships complete with a bolt carrier group and ZEROED accessories and is configured to use CMMG .22 AR conversion magazines. The compact 4.5″ barrel and free-float M-LOK handguard make this upper suited to cost-effective training, recreational precision, and compact range use. Components are specified for AR-pattern compatibility and straightforward installation on compatible lowers.

Key Specifications

• The platform is built on the Mk4 design for AR-pattern compatibility.
• The caliber is .22 LR for rimfire training and low-cost shooting.
• The barrel measures 4.5 inches, the shortest CMMG offers in any caliber per manufacturer text.
• The operating system is Traditional Blowback.
• The barrel twist is 1:16.
• The barrel material is 4140CM SBN.
• The barrel contour is MT.
• The muzzle threads are 1/2 x 28 to accept standard rimfire muzzle devices.
• The upper receiver is machined from Billet 6061 T6 Aluminum.
• The handguard is a CMMG EML4 M-LOK free-float design.

Whether used for economical range sessions, marksmanship practice, or compact rimfire duty, the Banshee MK4 upper group delivers AR-pattern familiarity with low-recoil .22 LR operation and a complete set of ZEROED accessories for immediate use. Its compact profile and M-LOK free-float handguard provide a practical balance of handling and accessory compatibility for shooters who prioritize reliable, accurate rimfire performance.

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