Cmmg Banshee Mk4 5.56 10.5 Armor Black

The CMMG Banshee Mk4 5.56 10.5" is a compact AR pistol built for shooters who need genuine capability without sacrificing portability. At just over 26 inches long and 5.5 lbs, this is the shortest 5.56mm Banshee CMMG makes—purpose-built for truck beds, backpacks, and close-quarters scenarios where a full-size rifle won't fit. Whether you're a backcountry hunter, a competition pistol shooter, or someone who values a nimble, potent truck gun, the Mk4 platform delivers the reliability and modularity you expect from an AR-pattern firearm in a size that actually goes places.

Built on CMMG's proven Mk4 lower receiver, this pistol accepts any standard AR15 upper—so you're not locked into CMMG parts, though they make solid alternatives. The setup includes a 10.5" barrel with a 1:7 twist and carbine-length gas system, paired with a CMMG ZEROED linear compensator to tame muzzle rise in a compact package. Direct impingement keeps things simple and proven. The billet aluminum upper, forged 7075-T6 lower, and M-LOK handguard balance weight savings with strength, while the CMMG RipBrace provides the support you need for solid shooting.

The Banshee ships with a ZEROED drop-in single-stage trigger, ambidextrous charging handle, and a Magpul 30-round PMAG—everything you need to run it straight out of the box. Armor Black Cerakote finish handles the elements without fuss. If you've been looking for a legitimate AR pistol that punches above its size class and actually fits your life, this is it.

Key Features

• Compact 10.5" barrel with 1:7 twist—the shortest 5.56mm Banshee CMMG offers
• Mk4 lower receiver compatible with standard AR15 uppers and CMMG conversion kits
• Direct impingement gas system with carbine-length port and non-adjustable gas block
• Billet 6061 T6 aluminum upper, forged 7075 T6 aluminum lower for strength-to-weight balance
• CMMG ZEROED linear compensator (1/2 x 28 thread) reduces muzzle rise
• M-LOK handguard for accessory mounting flexibility
• Ambidextrous ZEROED charging handle and safety selector (60/90 degree)
• Drop-in single-stage trigger pre-installed and ready to shoot
• RipBrace for secure support and control
• Includes Magpul 30-round PMAG
• Armor Black Cerakote finish for corrosion resistance

Specifications

Frequently Asked Questions

Will the Banshee Mk4 work with standard AR15 uppers?

Yes. The Mk4 platform is built on a standard AR15 pattern lower receiver, so it will accept any mil-spec AR15 upper. CMMG also makes dedicated uppers and conversion kits (with matching uppers) if you want to stick with their ecosystem.

What comes in the box?

The Banshee Mk4 ships with the lower receiver assembly (fully assembled with trigger, safety, and brace), a Magpul 30-round PMAG, and the upper receiver group with barrel, handguard, and charging handle pre-assembled and ready to shoot.

Is this suitable for hunting or just range use?

The 5.56mm Banshee with a 10.5" barrel is a legitimate truck gun and backcountry option for shooters who value compactness and capability. Whether it suits your specific hunting application depends on your local regulations, game, and personal shooting distances—consult your local hunting guidelines and consider ballistics carefully.

Can I upgrade or swap parts?

Absolutely. The Mk4 platform is modular. You can swap uppers, change out the brace, upgrade the trigger, add optics via the M-LOK handguard, or swap the muzzle device (it uses standard 1/2 x 28 threads). CMMG also produces compatible conversion kits if you want to change calibers down the road.