Cmmg Banshee MK4 5.56 NATO Semi-Auto Rifle, 10.5″ Barrel

Product Description

The CMMG Banshee MK4 is a semi-auto 5.56 NATO rifle built around a 10.5″ barrel. It comes in an FDE color, and it has a 30-round capacity. At 27.20″ overall and 6 lbs, it is a short, light rifle that is easy to move around in tight spaces.

The barrel has a 1:7″ twist rate and a threaded muzzle with 1/2″x28 threads. That thread pitch is common, so you have plenty of muzzle devices to choose from. The safety is the CMMG Zeroed 60/90 degree type, and the rifle is ambidextrous. A left-handed shooter can run it as easily as a right-handed one. The stock is a Magpul Moe RL Thrill Rugged Tactical.

Who it suits

With a 10.5″ barrel, this rifle is a short-barreled rifle under federal law. That means you need to complete the required NFA paperwork before you take it home. It fits a shooter who wants a compact 5.56 for range days, home defense planning, or a vehicle-friendly setup, and who is comfortable with that process.

For gear, start with a red dot or a low-power optic, a sling, and extra 30-round magazines. The 1/2″x28 muzzle accepts flash hiders, muzzle brakes and other devices that use those threads. A suppressor mount that matches the thread pitch is another option, with its own paperwork. Pick a good cleaning kit and quality 5.56 NATO ammunition to round it out.

Cmmg Banshee MK4 5.56 NATO Semi-Auto Rifle, 10.5" Barrel Specifications

Fits and Pairs With

• Winchester Repeating Arms M193 5.56 NATO 55 gr Ammo, 150 Rounds
• PMC Ammunition M855 Green Tip 5.56 NATO 62 gr Ammo, 840 Rounds
• Winchester Repeating Arms M193 Full Metal Jacket 5.56 NATO, 200 Rounds
• Winchester Repeating Arms M855 5.56 NATO 62 gr Ammo, 200 Rounds

Ordering from Western Sport

Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message. See our NFA guide for the current federal rules; state law still applies.

Frequently Asked Questions

Q: What caliber is the CMMG Banshee MK4?

A: 5.56 NATO. It is a semi-auto rifle with a 30-round capacity.

Q: Does the CMMG Banshee MK4 have a threaded barrel?

A: Yes. The muzzle is threaded 1/2"x28, so it takes muzzle devices that use that thread pitch.

Q: What is the barrel length and twist rate?

A: The barrel is 10.5" long with a 1:7" twist rate.

Q: Is the CMMG Banshee MK4 ambidextrous?

A: Yes. It is listed as ambidextrous and uses the CMMG Zeroed 60/90 degree safety.

Q: How much does the CMMG Banshee MK4 weigh?

A: 6 lbs. Overall length is 27.20".

Warranty and Manufacturer

Covered by the CMMG factory warranty; warranty terms come from CMMG.

Additional information