The CMMG Banshee MK4 in .300 AAC Blackout is an AR-pattern pistol designed for range use and personal defense applications where a compact, configurable platform is desired. Built on CMMG’s Mk4 architecture, the Banshee provides compatibility with common AR upgrades and a host of ZEROED components for consistent ergonomics.
The Banshee MK4 pairs a 12.5-inch threaded barrel with a medium-taper profile and a CMMG EML11 M-LOK handguard to balance maneuverability and accessory mounting options. Ergonomic controls include the CMMG ZEROED ambidextrous charging handle, ZEROED pistol grip, ZEROED drop-in single-stage trigger, and a RipBrace pistol brace for a compact shooting footprint.
Key Specifications
- The caliber is .300 AAC Blackout.
- The action is Semi-Auto.
- The barrel length is 12.5 inches.
- The barrel material is 4140 CM steel.
- The muzzle thread pattern is 5/8 x 24.
- The handguard is a CMMG EML11 M-LOK design.
- The magazine capacity is 30 rounds and one magazine is included.
- The weight is listed as 92 ounces.
- The firearm includes an ambidextrous safety and controls listed as Ambidextrous.
- The stock/brace type is a RipBrace pistol brace.
State Restrictions: This firearm is not available for direct shipment to Rhode Island or Washington, and it is not for sale in Illinois (PICA).
The CMMG Banshee .300 AAC Blackout combines compact performance and modular AR compatibility for shooters seeking a configurable pistol platform. Buy the CMMG Banshee .300 AAC Blackout online today for a versatile AR-pattern pistol option.









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