The CMMG BANSHEE MK4 AR Pistol in 5.7x28mm represents a purpose-built platform designed for compact utility and effective performance. Engineered for users demanding a high-velocity, low-recoil option in a sub-carbine footprint, this system integrates CMMG’s established AR-15 architecture with a unique operating system optimized for the 5.7x28mm cartridge.
Key Features
Caliber Integration
Chambered in 5.7x28mm, this platform delivers a flat trajectory and enhanced terminal ballistics over traditional pistol calibers. The cartridge’s characteristics mitigate recoil impulse, facilitating rapid follow-up shots and maintaining target acquisition under dynamic conditions. The 32-round magazine capacity provides substantial on-board firepower.
Radial Delayed Blowback System
A cornerstone of the CMMG BANSHEE series, the proprietary Radial Delayed Blowback operating system is precisely tuned for the 5.7x28mm cartridge. This system effectively reduces felt recoil and ensures reliable cycling without the need for a traditional gas impingement system or heavy bolt, contributing to a smoother shooting experience and reduced wear on components.
Compact Form Factor
The 5-inch barrel length significantly reduces the overall footprint, enhancing maneuverability in confined spaces and facilitating discreet transport. As an AR Pistol, it is optimized for configurations leveraging pistol braces, providing a stable shooting platform while adhering to NFA regulations.
Construction and Reliability
Utilizing standard AR-15 receiver materials (7075-T6 aluminum) and CMMG’s established manufacturing protocols, the BANSHEE MK4 maintains the rugged durability expected from the AR platform. Components are precision machined to ensure consistent function and longevity under rigorous use. The hard-coat anodized finish provides corrosion resistance and a durable exterior.
Ergonomics and Modularity
Equipped with a CMMG RML4 M-LOK handguard, the system allows for direct attachment of lights, lasers, and other accessories, maintaining a slim profile. A full-length Picatinny top rail provides expansive optics mounting options. Standard AR-15 controls and a CMMG ZEROED pistol grip ensure immediate familiarity for users accustomed to the platform.
Technical Specifications
- SKU: RSR|CMMG54A3B0F-AB
- Caliber: 5.7x28mm
- Barrel Length: 5 inches
- Barrel Material: 4140 Chrome Moly, SBN (Salt Bath Nitride)
- Muzzle Device: CMMG ZEROED Linear Compensator
- Twist Rate: 1:9
- Operating System: CMMG Radial Delayed Blowback
- Capacity: 32 Rounds (CMMG 5.7x28mm Magazine)
- Upper Receiver: Forged 7075-T6 Aluminum, M4 Type
- Lower Receiver: Forged 7075-T6 Aluminum, CMMG MK4 (AR15)
- Handguard: CMMG RML4 M-LOK
- Pistol Grip: CMMG ZEROED Pistol Grip
- Buffer Tube: CMMG Mil-Spec Pistol Receiver Extension
- Finish: Hard Coat Anodized
