CMMG 30AB20FTNG Banshee MK4 .300 Blackout 12.5" 31-Round Carbine

The CMMG 30AB20FTNG Banshee MK4 in 300 Blackout is a short-barrel, integrally optimized platform purpose-built for subsonic suppressed fire and precision shooting in compact operating environments. Featuring a 12.50-inch black nitride medium taper threaded barrel, this rifle delivers the velocity and sound suppression advantages of 300 Blackout in a package sized for vehicle operations, close-quarters work, and specialized tactical applications where conventional carbine lengths create handling liability.

The Banshee MK4 employs CMMG's modular component architecture, including a tungsten cerakote aluminum Picatinny rail receiver, extended M-LOK handguard (7 inches), and full-length M-LOK slot coverage on both sides, bottom, and between top rail sections. This allows unlimited mounting flexibility for optics, lights, and support gear. The 30+1 round capacity positions the platform for sustained engagement, while the included ZEROED components—ambidextrous safety, ambi charging handle, bolt catch, extended magazine release, and ambi magazine catch—enable intuitive operation across dominant and support hands without mechanical compromise.

This configuration serves operators, designated marksmen, and serious enthusiasts who demand subsonic capability with genuine sound reduction when suppressed. The 300 Blackout cartridge maintains superior ballistic performance over 9mm in short barrels while delivering subsonic loads that function reliably in suppressed rifles. At 10 pounds, the Banshee MK4 balances firepower and maneuverability for duty, training, and precision applications where conventional rifle ergonomics and modularity are non-negotiable.