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CMMG Mk4 Banshee 4.6x30mm

CMMG Mk4 Banshee 4.6x30mm

4.5
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  • Extremely low recoil
  • AR-15 modularity
  • Reliable
  • Expensive
  • Ammo can be hard to come by

Editor’s Note: The CMMG FourSix Banshee brings the 4.6x30mm cartridge from the MP7 into the world of AR-15 pistol-caliber carbines. The 4.6x30mm is a small and lightweight cartridge with extremely low recoil, comparable to the 5.7x28mm round. The FourSix boasts an impressive 40-round capacity and gives users all the modularity that comes with the AR-15 platform. This gun features fully ambidextrous controls and a complete set of upgraded ZEROED furniture and controls, and a includes a linear compensator.

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Product Details

Caliber
4.6X30MM
Action
Semi-Auto
Barrel Length
8in
Finish
Burnt Bronze
Magazine Capacity
40rd

Features

Extremely low recoil
AR-15 modularity
Reliable
Expensive
Ammo can be hard to come by

By The Numbers

Accuracy
t’s a wee little round, so don’t expect to go out too far. But at reasonable (shorter) distances, you can make tiny holes right where you want them.
Reliability
I’ve heard internet rumors that one guy’s mag didn’t work and that there’s been a few issues with the Fiocchi ammo. But for me and this test? Zero issues. It ran like crazy.
Customization
Full rail + M-Lok + AR modularity? Customize all the things!
Ergonomics
I like the MOE grip, and the controls are great…especially that ambi charging handle, but it’s still (just) an AR. Nothing to write home to Momma about.
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FINAL VERDICT

"Overall, there’s not much to complain about here. The FourSix runs, and it’s gorgeous. CMMG backs it up with their lifetime warranty. And…it’s doggone cool." - Johnny B