CMMG Banshee 5.7x28mm Complete Upper - 5" - Armor Black

Manufactured by CMMG
Manufactured by CMMG
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The CMMG Banshee utilizes the reliable Radial Delayed Blowback operating system, optimized for Pistol Caliber Carbines, to deliver the most reliable and compact PCC systems available. This complete upper features a 5-inch 4140CM medium taper profile barrel with a 1:9 rate of twist and a 1/2x28 threaded muzzle equipped with a recoil-mitigating compensator. The CMMG EML4 M-LOK handguard allows users to attach lights, lasers, and other accessories. While this complete upper is designed for use with CMMG Mk57 lowers, it is compatible with standard AR-15/M4 lowers, provided a CMMG 5.7 conversion magazine is used. Includes CMMG Zeroed ambidextrous charging handle, CMMG Zeroed linear compensator, and a durable Armor Black cerakote finish.

  • Complete 5.7x28mm upper receiver
  • Radial delayed blowback operating mechanism
  • 5-inch MT profile barrel with compensator
  • M-LOK handguard
  • Billet aluminum upper
  • Armor Black cerakote finish
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Barrel ContourMedium Taper
Barrel Length5.0
Barrel Material4140 Chrome Moly Steel
Caliber Gauge5.7X28mm
Gas System TypeRadial Delayed Blowback
Muzzle DeviceCompensator
Twist Rate1:9
Weight2.5 lbs
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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