The CMMG Banshee is a semi-automatic pistol-caliber carbine chambered in .300 Blackout. Its 8-inch barrel and 23.7-inch overall length make it one of the more compact platforms in this caliber, which suits close-quarters work and easier storage. At 4.7 lbs. it's easy to handle for extended sessions. 
 

Key Specifications 

• SKU: 2024036474 
• UPC: 810144724119 
• Condition: New in Box 
• Finish: Black 
• Safety: CMMG Zeroed 60/90 Degree 
• Trigger: Standard 
• Grip: CMMG Zeroed 
• Weight: 4.7 lbs 
• Length: 23.7" 
• Barrel Length: 8" 
• Capacity: 30+1 RD 
• Action: Semi-Auto 
• Caliber: .300 BLACKOUT 
   

Features 

 
The CMMG Zeroed safety has 60/90-degree throw options, so you can set it to the position that feels right for your grip. The standard trigger gives a predictable pull, nothing fancy, but consistent. The 30+1 capacity is standard for the platform. 
 
.300 Blackout in an 8-inch barrel is where this caliber is most at home. Subsonic loads run quietly with a suppressor, and supersonic loads still hit hard at typical defensive distances. The compact size trades off some range performance for maneuverability, which is the expected tradeoff at this barrel length.

The CMMG Banshee in .300 Blackout draws consistent praise for its compact form and the versatility that comes with the caliber. Users who run both supersonic and subsonic ammunition appreciate being able to do both on the same platform. The ability to run suppressed subsonic loads is a frequently cited reason for choosing it.

Build quality gets positive marks across most reviews. Owners describe it as solid and reliable, with a shooting experience that's smooth and low-recoil compared to larger-caliber alternatives. New shooters and experienced ones both find it approachable.

The most common criticism is price. It sits above mid-range options, and some buyers question the value against alternatives. Aftermarket accessory availability is a secondary concern for a subset of owners, though the platform does have options. A few users note that .300 Blackout from an 8-inch barrel loses effectiveness at longer distances, which is an honest tradeoff for the compact size rather than a defect.