CMMG Banshee MK4 5.7x28mm 5" 41-Round Threaded Barrel Carbine

The CMMG Banshee MK4 5.7x28mm 5" Threaded Barrel Carbine is purpose-built for operators and enthusiasts seeking a compact, low-recoil platform with extended magazine capacity. Chambered in 5.7x28mm, this carbine delivers reduced sound signature and minimal muzzle rise compared to traditional rifle rounds, making it ideal for close-quarters operations, home defense, and specialized law enforcement applications. The 41-round capacity provides sustained firepower without frequent reloads, a critical advantage in high-stress scenarios.

Built on CMMG's proven Banshee platform, this MK4 variant features a 5-inch threaded barrel with black nitride finish for corrosion resistance and durability in field conditions. The medium taper design balances rigidity and weight, while the threaded muzzle accepts standard 1/2x28 suppressors and compensators, enabling sound mitigation or recoil management based on mission requirements. At 8.8 pounds unloaded, the carbine remains maneuverable in confined spaces while maintaining sufficient mass for consistent shooting dynamics and accessory mounting.

This platform excels for tactical shooters, law enforcement personnel evaluating non-lethal or specialized ammunition options, and competitive shooters in 5.7x28mm classes. The compact 13.5-inch length (with a 39.6-inch overall profile) suits vehicle storage, breaching scenarios, and environments where rifle-length weapons create disadvantage. Direct-impingement operation ensures reliability with commercial 5.7x28mm ammunition, and the modular design accommodates rail-mounted optics, lights, and ergonomic controls for operator preference.