Description

The CMMG Banshee Mk4 SBR fills the role of a compact, NFA-regulated short-barreled rifle built on the Mk4 AR-platform architecture. Chambered in 5.56 NATO and fitted with a 12.5″ barrel, the Banshee Mk4 is designed for situations where a standard-length AR-pattern rifle would be unwieldy, while still delivering 5.56 NATO terminal performance. The Mk4 designation indicates CMMG’s AR-15-compatible lower and upper receiver platform, providing broad compatibility with standard AR-15 components and accessories.

As an NFA-regulated SBR, this firearm requires a tax stamp and registration with the ATF prior to transfer. The Coyote Tan finish provides a subdued, earth-toned appearance suited to field and duty use. The Banshee line sits alongside CMMG’s DISSENT series in their compact carbine lineup, with the Banshee Mk4 12.5″ representing a middle-ground barrel length between the 10.5″ and longer configurations available in the same family.

Key Features

• Firearm Type: Short-Barreled Rifle (SBR)
• Action: Semi-automatic
• Caliber: 5.56 NATO
• Barrel Length: 12.5″
• Twist Rate: Not specified
• Threaded Barrel: Not specified
• Finish: Coyote Tan
• Platform: Mk4 (AR-15 compatible)
• Weight (Unloaded): Not specified

Use Case

• 12.5″ barrel delivers 5.56 NATO ballistics in a compact SBR form factor suited to vehicle operations, building clearance, and close-quarters environments
• Mk4 AR-15-compatible platform accepts standard AR-15 components, magazines, and accessories
• Coyote Tan finish provides a low-visibility, earth-toned profile for field and duty applications
• NFA-regulated SBR configuration provides legal short-barrel length while retaining a standard rifle stock interface
• Banshee Mk4 family offers multiple barrel lengths (10.5″, 12.5″) and calibers (5.56 NATO, .300 BLK), allowing direct component cross-compatibility within the platform

Compliance & Legal Notes

• FFL Transfer Required: This firearm must ship to a licensed Federal Firearms Licensee (FFL) and will be transferred to the buyer in accordance with federal, state, and local law.
• Shipping Restrictions Apply: Some jurisdictions restrict or prohibit certain firearms or features. Orders may be modified or canceled if delivery is not legally permitted.
• Buyer Responsibility: The buyer is responsible for ensuring this firearm is legal to purchase, possess, and transfer in their jurisdiction.
• NFA Item: This firearm is classified as a Short-Barreled Rifle (SBR) under the National Firearms Act (NFA). Transfer requires ATF approval, payment of a $200 tax stamp, and registration. Processing times vary. Buyer must comply with all federal, state, and local NFA regulations.

Box / Package Contains

• One factory-new CMMG Banshee Mk4 SBR, 5.56 NATO, 12.5″, Coyote Tan
• Magazine (count and capacity not confirmed — verify against live CMMG manufacturer page or distributor before publishing)
• Manufacturer lock
• Owner’s manual