CMMG Banshee MK4 300 Blackout 12.5" 30+1 Semi-Auto Pistol

The CMMG Banshee MK4 is a compact 300 Blackout AR-style pistol built around CMMG's Mk4 platform. Originally created for optimum performance in subsonic, suppressed, and short-barrel applications with supersonic ammo loadings, the Banshee pairs a small footprint with hard-hitting defensive capability.

Up front, this model carries a 12.5" medium-taper threaded barrel finished in black nitride for corrosion resistance. The 7" EML M-LOK handguard provides an ergonomic gripping surface and accepts lights, lasers, or bipods along its M-LOK mounting slots. The upper and lower receivers are machined from aluminum and finished in protective Tungsten Cerakote, with a full-length Picatinny rail on top for red dots, prismatic optics, and magnifiers.

Operating as a semi-auto, this Banshee is configured around a 30+1 capacity via a detachable box magazine. A CMMG Zeroed grip delivers solid hand purchase, while the CMMG Zeroed 60/90 degree safety offers intuitive selector manipulation. The pistol ships with no installed sights, letting the end user tailor sighting to role and use case.

Compact, capable, and built around the MK4 platform, this 300 Blackout AR pistol is at home behind a suppressor running subsonic ammo, pushing full-power supersonic loads, or serving as a hard-hitting short-barreled defensive option. The combination of a Tungsten Cerakote finish, threaded barrel, and 7" M-LOK handguard makes it a versatile foundation for a wide range of builds.

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