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Upper Group, Banshee 300, Mk4, 22LR


CMMG is temporarily halting the sale of complete firearms, upper receiver groups, lower receiver groups, and Radial Delayed Blowback BCG kits on our website in order to focus on outstanding orders. We apologize for the inconvenience and appreciate your patience as we traverse this extremely busy time. Sign up for notifications on your favorite products to get notified when they become available again or find a local dealer on our dealer page.

Upper Group, Banshee 300, Mk4, 22LR

If you are looking for the most compact .22 LR complete upper, then look no further than the Banshee 300 Mk4 Upper Group. Available in black hard coat anodized or 10 different premier cerakote colors, additional features include a CMMG ZEROED ambi charging handle, KAK Slim Flash Can, and CMMG RML4 M-LOK handguard.

All of our Upper Groups come complete with BCG.


Technical Specifications

Platform Mk4
Caliber .22 LR
Operating System Traditional Blowback
Barrel Length 4.5
Barrel Contour MT
Barrel Material 4140CM, SBN
Muzzle Device KAK Slim Flash Can
Muzzle Thread 1/2 X 28
Gas Port Location N/A
Gas Block N/A
Upper Receiver Forged 7075-T6 AL M4 type upper
Hand Guard CMMG RML4 M-LOK
Finish Hard Coat Anodized Receivers and Hand Guard (Can be upgraded to Cerakote)
Charging Handle CMMG ZEROED Ambi Charging Handle AR15
Weight 2.5

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