The CMMG Banshee is a compact semi-automatic pistol chambered in 5.7x28mm with an 8-inch barrel and 32+1 round capacity. It's optics-ready with no factory sights, so you mount whatever glass fits your needs. The CMMG Zeroed grip and trigger ship ready to shoot without adjustment. 
 

Key Specifications 

• SKU: 2024036495 
• UPC: 810148624095 
• Condition: New in Box 
• Safety: CMMG Zeroed 60/90 Degree 
• Trigger: Standard 
• Grip: CMMG Zeroed 
• Sights: None (optics-ready) 
• Barrel Length: 8 inches 
• Capacity: 32+1 rounds 
• Action: Semi-Auto 
• Caliber: 5.7x28mm 
• Model Name: Banshee 
• Brand: CMMG 
   
  The 5.7x28mm cartridge runs flat with low recoil compared to traditional pistol rounds, and 32+1 capacity means fewer reloads during a range session. The 8-inch barrel keeps overall length manageable while squeezing more velocity from the round than a typical pistol-length barrel would. Home defense, range use, or competitive shooting all fit the platform.

Owners of the CMMG Banshee in 5.7x28mm tend to have mixed but generally positive opinions.

The compact build and light weight get consistent praise. The 8-inch barrel is seen as a good compromise between portability and accuracy, and the 32+1 capacity is a practical advantage for extended range sessions. Low recoil from the 5.7x28mm round comes up repeatedly as a selling point, particularly for newer shooters.

The main recurring criticism is ammunition cost and availability. 5.7x28mm is pricier than 9mm or .45 ACP and can be harder to find locally, which matters for anyone planning to shoot it regularly. Ergonomics draw occasional complaints about fit for smaller or larger hands, and a few users have noted that certain controls could be better positioned. Reliability reports are mostly positive, though a minority of owners have mentioned function issues that colored their long-term view of the platform.