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

The CMMG 30AB20FTNG Banshee MK4 .300 Blackout 12.5" carbine is purpose-built for operators who demand a compact, magazine-fed rifle platform without sacrificing effective range or reliability. Designed for law enforcement tactical teams, military special operations, and civilian precision shooters, this short-barrel carbine excels in close-quarters combat, vehicle operations, and home defense scenarios where maneuverability is non-negotiable. The .300 Blackout cartridge delivers proven subsonic and supersonic performance, making it the preferred choice for suppressed duty rifles and specialized applications where conventional 5.56 platforms fall short.

The Banshee MK4 leverages CMMG's proven modular design philosophy, utilizing a direct blowback operating system optimized specifically for .300 Blackout ballistics. The 12.5-inch barrel balances velocity with maneuverability—critical for enclosed spaces and vehicle egress—while the integrated buffer tube and carrier group eliminate common accuracy variables associated with piston designs. With a 31-round magazine capacity and 10-pound weight distribution, the carbine maintains controllability during rapid fire and allows practical transitions between shooting positions. The fixed stock and pistol-grip configuration provide consistent cheek weld geometry, essential for consistent aim point management in high-stress encounters.

This platform benefits operators requiring a dedicated .300 Blackout rifle for specialized mission profiles—from suppressed operations to precision intermediate-range work beyond the effective range of pistol-caliber carbines. The 31-round magazine capacity provides sustained fire capability without frequent reload cycles, critical in team-based tactical engagements. The compact footprint (39.6 inches overall length) makes this carbine ideal for vehicle-mounted operations, tactical entries, and environments where full-size rifle platforms create tactical disadvantages. Shooters familiar with AR-pattern controls will find the Banshee MK4 immediately intuitive, with standard controls and accessory compatibility supporting mission-specific configurations through Picatinny rail integration.