CMMG Banshee MK4 Suppressed .300 Blackout 6.5" Upper Receiver Assembly 30B0EA9AB (UPC 840442510374)

The CMMG Banshee MK4 Suppressed .300 Blackout 6.5" Upper Receiver Assembly 30B0EA9AB (UPC 840442510374) is a high-performance, factory-built short-barreled upper designed for shooters who want maximum power and suppressed performance in a compact package. Chambered in .300 Blackout and featuring a 6.5-inch barrel, this Banshee MK4 upper is optimized from the factory for suppressor use. CMMG engineered this upper to deliver excellent ballistic performance with both supersonic and subsonic ammunition while maintaining reliable function when paired with a suppressor. Whether you’re building a dedicated suppressed SBR, a compact home defense rifle, or a high-performance hunting upper, the CMMG Banshee MK4 Suppressed .300 BLK upper offers outstanding quality, accuracy, and suppressor compatibility right out of the box.

CMMG has established itself as a leader in innovative AR platform components. The Banshee series is known for its compact size, lightweight construction, and exceptional performance in short-barreled configurations. This suppressed model takes that reputation even further by coming optimized for suppressed shooting.

Factory Suppressed Optimization

One of the standout features of this upper is its factory-suppressed design. The 6.5-inch barrel is specifically configured to work seamlessly with suppressors. CMMG has tuned the gas system and included the proper muzzle device to ensure reliable cycling with both subsonic and supersonic .300 Blackout loads when a suppressor is attached. This eliminates the guesswork and potential reliability issues that can occur when pairing aftermarket components. Shooters can simply install their preferred suppressor and enjoy consistent, dependable performance.

.300 Blackout Performance in a Compact Package

The .300 Blackout cartridge shines in short-barreled configurations like this 6.5-inch Banshee upper. It delivers excellent terminal performance with subsonic ammunition when suppressed, making it ideal for home defense and tactical applications. When using supersonic loads, the upper provides impressive velocity and energy for hunting medium-sized game. The 1:7 twist rate stabilizes a wide range of bullet weights, giving shooters flexibility in ammunition selection. The short 6.5-inch barrel keeps the overall length minimal while still extracting strong performance from the .300 BLK cartridge.

Banshee MK4 Platform Advantages

The Banshee MK4 upper is built on CMMG’s proven Banshee platform, which is designed specifically for short-barreled rifles. It features a lightweight yet durable forged 7075-T6 aluminum upper receiver paired with a high-quality 6.5-inch barrel. The included CMMG RML7 M-LOK handguard provides ample rail space for accessories while keeping weight to a minimum. This combination results in a compact, well-balanced upper that is easy to maneuver in tight spaces.

Suppressor Ready Features

This upper is specifically engineered for suppressed use. The gas system has been optimized to function reliably with the back pressure created by a suppressor. The muzzle device is designed to work with most popular suppressor mounting systems, allowing users to quickly attach and detach their suppressor as needed. This level of factory optimization helps reduce gas blowback to the shooter and improves overall reliability when running suppressed.

Ideal Applications

• Suppressed home defense builds
• Short-barreled rifle (SBR) configurations
• Compact hunting rifles for medium game
• Tactical and professional use
• Shooters who want a factory-suppressed .300 BLK upper
• Low-signature shooting with subsonic ammunition

Why Choose the CMMG Banshee MK4 Suppressed .300 BLK Upper?

• Factory optimized for suppressor use
• Compact 6.5-inch .300 Blackout barrel
• Reliable function with subsonic and supersonic loads
• Lightweight Banshee MK4 platform
• M-LOK handguard for accessory mounting
• High-quality CMMG components and construction
• Excellent balance of size, weight, and performance
• Ready to pair with your favorite suppressor

The CMMG Banshee MK4 Suppressed .300 Blackout 6.5" Upper Receiver Assembly 30B0EA9AB (UPC 840442510374) is a premium, factory-built upper designed for shooters who want a compact, suppressor-optimized .300 Blackout platform. With its 6.5-inch barrel, suppressor-tuned gas system, and Banshee MK4 construction, this upper delivers outstanding performance in a small package. The .300 Blackout cartridge excels in short barrels, providing excellent terminal ballistics with subsonic ammunition when suppressed. Whether you’re building a dedicated suppressed SBR for home defense, a compact hunting rifle, or a high-performance tactical upper, the CMMG Banshee MK4 Suppressed upper offers the reliability, accuracy, and suppressor compatibility that serious shooters demand. Built with quality components and engineered specifically for suppressed use, this upper eliminates the common issues associated with pairing short barrels and suppressors. Add the CMMG Banshee MK4 Suppressed .300 BLK upper to your next build and experience the performance of a purpose-built, factory-optimized suppressed upper receiver.

Build your suppressed .300 Blackout rifle with the CMMG Banshee MK4 Suppressed Upper.