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Due to high demand and supply chain issues affecting many industries, some of our parts and accessories may be on backorder and have an extended lead time. Items currently on backorder can still be purchased and orders will be shipped out in the order they were received. We apologize for the inconvenience and appreciate your patience as we traverse this extremely busy time.


Don’t build a .22 LR that looks like an AR, build an AR that happens to be chambered in .22 LR. Equipped with a 4.5” barrel, the shortest CMMG® offers in any caliber, this BANSHEE™ upper group is built on the Mk4 platform, and is designed to work with any standard AR15 lower group and use our .22 AR Conversion Mags. Available in six different Cerakote finishes, all CMMG® Upper Groups come complete with bolt carrier group and ZEROED™ accessories including:

ZEROED AR15 Polymer Dust Cover

ZEROED .22LR Ambi Charging Handle

ZEROED .22LR Flash Hider


Lifetime Quality Guarantee

We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.

Technical Specifications

Platform Mk4
Caliber .22 LR
Operating System Traditional Blowback
Barrel Length 4.5
Barrel Twist 1:16
Barrel Contour MT
Barrel Material 4140CM, SBN
Barrel Twist 1:16
Muzzle Device CMMG ZEROED Flash Hider
Muzzle Thread 1/2 x 28
Gas Port Location N/A
Gas Block N/A
Upper Receiver Billet 6061 T6 Aluminum
Hand Guard CMMG EML4 M-LOK
Finish Cerakote Standard
Charging Handle CMMG ZEROED Ambi
Weight 2.2 lbs
Length 12.8"

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