CMMG Banshee MK4 338 ARC 10.5" Barrel AR Pistol - Armor Black

The CMMG Banshee MK4 in 338 ARC delivers exceptional power in a compact platform, transforming the AR-15 format into a hard-hitting hunting and tactical rifle. This 10.5-inch barreled configuration maximizes the 338 ARC cartridge's ballistic potential while maintaining maneuverability.

What Makes This Different

The Banshee MK4 utilizes CMMG's proven Mk4 lower receiver paired with their proprietary bolt and barrel extension system optimized for the 338 ARC cartridge. Unlike standard AR platforms chambered in traditional calibers, this system handles the increased pressure and case dimensions of 338 ARC while maintaining reliable cycling. The 10.5-inch barrel length provides optimal velocity for hunting applications while keeping overall length manageable.

Key Features

• 338 ARC chambering delivers superior ballistics over 300 Blackout and 5.56 NATO
• 10.5-inch 4140 chrome moly steel barrel with 1:7 twist rate
• CMMG RipBrace pistol stabilizing brace for enhanced control
• Ambidextrous safety selector and magazine release
• M-LOK compatible handguard for accessory mounting
• Single-stage trigger with crisp 4.5-6 pound pull weight
• Armor Black Cerakote finish for corrosion resistance

Field performance centers on the 338 ARC's ability to deliver rifle-level energy at extended ranges. The cartridge maintains over 1,000 foot-pounds of energy past 500 yards, making it effective for medium game hunting and precision applications. The compact platform excels in confined spaces while the stabilizing brace provides consistent shooting positions. Weather-sealed components ensure reliable function in adverse conditions.

Technical Specs

• Caliber: 338 ARC
• Barrel Length: 10.5 inches
• Overall Length: 27.5 inches (brace collapsed)
• Weight: 6.2 pounds (unloaded)
• Twist Rate: 1:7
• Magazine Capacity: 10 rounds (included)
• Handguard: M-LOK compatible aluminum
• Finish: Armor Black Cerakote
• Manufactured: United States

The Banshee MK4 represents CMMG's engineering expertise applied to a specialized hunting and tactical platform. Limited production runs and growing 338 ARC popularity make this configuration increasingly sought after among serious shooters.