CMMG Banshee MK4 | 10.5 in | RipBrace | 34A390F-AB

The CMMG Banshee MK4 is a compact AR-format pistol built with a Mk4 billet upper and a forged lower, configured with a 10.5-inch barrel and a RipBrace for compact handling. Source entries include CMMG ZEROED controls and a linear compensator; however, some product data fields conflict (see notes). This pistol is presented as a compact platform well-suited to short-barrel precision work and suppressed-range use. A practical optic under $1,000 to pair with this package is a low-power variable 1-6x (for example, a Vortex 1-6x) for fast target acquisition at close to mid ranges.

Product Specifications

• The model is CMMG Banshee MK4.
• The manufacturer’s part number is 34A390F-AB.
• The barrel measures 10.5 inches.
• The caliber entry is listed as multiple entries; see notes in the source data.
• The action/operating system is direct impingement semi-automatic.
• The barrel material and finish are 4140CM steel with a nitride finish.
• The barrel twist is 1:8.
• The muzzle device is a CMMG ZEROED Linear Compensator.
• The muzzle threads are 5/8 x 24.
• The upper receiver is Mk4 billet 6061 T6 aluminum.
• The lower receiver is Mk4 forged 7075 T6 aluminum.
• The handguard is listed as EML9 (EML11 also appears in source data; see notes).
• The stock/brace is a CMMG RipBrace.
• The product includes one magazine; capacity varies in source data (see notes).
• The UPC is 840442506582.

The Banshee MK4 combines compact ergonomics with CMMG’s Mk4 component set to provide a straightforward, modular pistol platform. Its billet/forged construction and CMMG ZEROED controls make it a practical foundation for optics, muzzle devices, and user-driven accessory choices. For shooters seeking a compact AR-style package for short-range precision or suppressed-range applications, this configuration offers a capable baseline that supports further customization.

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