CMMG Banshee Mk4 .308 Win Pistol 12.5" Barrel

The Modern .308 Pistol

The CMMG Banshee Mk4 represents a significant evolution in compact rifle design. Built on the proven AR-10 Mk3 platform—based on the LR-308/DPMS Gen 1 high-pattern design—this .308 Winchester pistol delivers rifle-class power in a package optimized for close-quarters work and personal defense.

Proven Caliber, Compact Package

The .308 Winchester has earned its reputation over more than 70 years as the go-to cartridge for hunters, marksmen, and military forces worldwide. While the 12.5" barrel sacrifices some of the long-range performance of a full-length rifle, it retains the stopping power and reliability that makes .308 Win a serious choice for any mission.

Built for Modularity

True to AR platform tradition, the Banshee Mk4 prioritizes customization:

• EML Handguard with full-length M-LOK slots on both sides and bottom
• M-LOK mounting points between top Picatinny rail sections for maximum accessory flexibility
• Ambidextrous controls throughout: safety, mag catch, charging handle, and bolt catch
• ZEROED components including drop-in trigger, extended mag release, and ambi pistol grip
• Linear compensator to manage recoil and muzzle signature

What's Included

Each Banshee Mk4 ships with a 20-round PMAG magazine and polymer dust cover, ready to configure for your specific needs. The black finish provides a professional, no-nonsense appearance suitable for any role.

Whether you're building a personal defense weapon, a specialized training platform, or a compact hunting rifle, the Banshee Mk4 gives you the foundation to create exactly what you need.