CMMG 99A290F-AB BANSHEE MKGS 5" Pistol

The CMMG 99A290F-AB BANSHEE MKGS 9mm 5" Arm Black is a purpose-built 9mm AR platform pistol designed for shooters who demand Glock magazine compatibility and proven AR ergonomics in a compact format. Following the successful MkG platform, CMMG engineered the BANSHEE MKGS to accept standard double-stack 9mm Glock-pattern magazines—eliminating the need for proprietary magazine ecosystems and simplifying logistics for operators, law enforcement, and serious shooters.

Core features include last-round bolt hold-open functionality, enabling tactical reloads and magazine changes without manual intervention. The RIPBRACE rapid-deployment brace provides quick, repeatable positioning for a variety of shooting postures and mounting scenarios. Full-length M-LOK slots on both sides and the bottom of the EML handguard—plus additional M-LOK integration between picatinny rail sections—deliver genuine modularity for lights, lasers, and accessory mounting. The 5-inch configuration balances velocity retention in the 9mm cartridge with maneuverability in confined spaces, making it suitable for vehicle deployment, close-quarters work, or range-focused shooting disciplines.

This platform addresses a clear gap for operators seeking AR-platform reliability and modularity in 9mm without compromising on magazine interchangeability. At 9.7 lbs unloaded and measuring 39.5 inches overall, the BANSHEE MKGS fits tactical and recreational shooting profiles alike—from duty configurations to long-range precision shooting using standard 9mm factory ammunition. Shooters transitioning from Glock-based carbines or those already invested in Glock magazine inventories will find immediate practical value in this configuration.