CMMG Banshee MK4 308 Winchester 12.5" Barrel AR Pistol Black

The CMMG Banshee MK4 in 308 Winchester delivers full-rifle performance in a compact AR pistol platform. This 12.5-inch barreled configuration bridges the gap between portability and ballistic effectiveness, offering serious stopping power for tactical applications and hunting scenarios where maneuverability matters.

What Makes This Different

Built on CMMG's proven MK4 platform, this Banshee variant handles the demanding 308 Winchester cartridge through an optimized gas system and robust construction. The 12.5-inch barrel length provides an ideal balance between velocity retention and compact handling, while the AR-15 style controls ensure familiar operation. CMMG's proprietary barrel extension and bolt design manage the higher pressures and recoil forces that challenge lesser systems.

Key Features

• 308 Winchester chambering for maximum terminal performance
• 12.5-inch 4140 chrome moly steel barrel with 1:10 twist rate
• Ambidextrous safety selector and charging handle
• M-LOK compatible handguard for accessory mounting
• SB Tactical pistol brace for stability and legal compliance
• Single-stage trigger group with 4.5-6 lb pull weight
• Hard coat anodized aluminum receivers in armor black finish

Field performance demonstrates consistent sub-2 MOA accuracy with quality ammunition, while the gas system cycles reliably across temperature extremes. The platform excels in close-quarters tactical environments where rifle-caliber power is required but carbine length proves restrictive. Hunters appreciate the combination of knockdown power and woodland maneuverability for brush hunting and blind setups.

Technical Specs

• Caliber: 308 Winchester/7.62x51 NATO
• Barrel Length: 12.5 inches
• Overall Length: 30.25 inches (brace collapsed)
• Weight: 7.8 pounds (unloaded)
• Twist Rate: 1:10 inches
• Gas System: Pistol length
• Handguard: M-LOK compatible aluminum
• Finish: Hard coat anodized armor black
• Magazine Capacity: Accepts SR-25 pattern magazines
• Manufactured: United States

This Banshee MK4 represents CMMG's commitment to engineering excellence in the large-frame AR pistol category. The combination of proven 308 ballistics and compact handling creates a versatile platform for serious users who demand both power and practicality.