CMMG 30AB20FSG Banshee MK4 .300 Blackout 12.5" 31-Round Rifle

The CMMG 30AB20FSG Banshee MK4 .300 Blackout 12.5" rifle is purpose-built for operators and precision shooters who demand subsonic performance in a compact, mission-ready platform. This 31-round rifle excels in close-quarters scenarios, suppressed operations, and tactical deployments where barrel length and noise signature are critical constraints. Law enforcement precision teams, military support personnel, and civilian tactical practitioners benefit from the Banshee's modularity and inherent subsonic ballistic advantage in .300 Blackout—a cartridge engineered specifically for suppressor integration and reduced acoustic signature without sacrificing stopping power.

The 12.5-inch barrel delivers optimal subsonic velocity stability while maintaining the ergonomic profile necessary for vehicle operations, building clearance, and fast target transitions. At 10.2 pounds unloaded, this rifle strikes a balance between controllability and sustained accuracy, critical when engaging multiple threats or holding position in extended operations. The 31-round magazine capacity maximizes engagement potential without requiring reload drills under duress, and CMMG's monolithic upper receiver design enhances rigidity and optic mounting repeatability. The .300 Blackout cartridge naturally suppresses to hearing-safe levels—typically 135–145 dB with quality cans—allowing team coordination without electronic communication dependency and preserving situational awareness in hostile environments.

Operators employing the CMMG Banshee MK4 should pair this system with quality .300 Blackout ammunition—both subsonic loads for suppressed work and supersonic rounds for extended-range capability. Standard AR-platform optics, suppressors rated for .300 Blackout, and modular furniture integrate seamlessly with existing tactical load-outs. The compact 39.6-inch overall length and threaded muzzle design accommodate a variety of sound suppressors, while the 31-round magazine facilitates force multiplication in multi-operator scenarios. This rifle represents a mature, field-proven platform for teams prioritizing acoustic signature control, compactness, and terminal performance in contested environments.