CMMG Banshee Mk4 .300 Blackout 8" 30+1 Semi-Auto Pistol

The CMMG Banshee Mk4 is a compact, AR-pattern 300 Blackout pistol built around an 8" barrel and a direct-impingement operating system. Designed for short-range, suppressed, and subsonic use, this semi-automatic pistol delivers the .300 BLK cartridge in one of the most maneuverable AR platforms CMMG produces.

The 8" barrel uses CMMG's MT contour in 4140CM chrome-moly steel with a salt bath nitride finish, running a 1:7 twist to stabilize a wide range of .300 BLK bullet weights. Threaded 5/8x24 for suppressor or compensator mounting, the barrel ships with CMMG's ZEROED Linear Comp muzzle device already installed. An adjustable .750" gas block lets you tune cycling for supersonic, subsonic, or suppressed configurations.

The Banshee Mk4 features an M-LOK handguard for accessory mounting, finished in a non-reflective black Cerakote across the receiver and handguard. Controls come courtesy of the CMMG ZEROED 60/90 degree ambidextrous safety and the matching ZEROED pistol grip. Sights are not included, letting you mount the optic or iron set of your choice. The platform weighs just 4.70 lbs empty and measures 23.70" overall.

Set up as a pistol-format AR chambered in .300 Blackout, the CMMG Banshee Mk4 is rated for 30+1 rounds and ships with one 30-round PMAG included. Whether you are running supersonic defensive loads, subsonic rounds through a suppressor, or just want the shortest, hardest-hitting AR-pattern pistol CMMG makes, the Banshee Mk4 is a turnkey .300 BLK package.

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