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The .300 Blackout cartridge was built from day one to do its best work out of short barrels, and the CMMG Banshee Mk4 is exactly the kind of platform it was made for. The 8 inch 4140 chrome moly barrel wears a salt bath nitride finish and a medium taper profile, and the 1:7 twist stabilizes everything from lighter supersonic loads to heavy 220 grain subsonics. Muzzle threads are the standard 5/8×24, so when you're ready to hang a can on it, the factory ZEROED linear compensator spins right off. Until then, that comp pushes blast and concussion forward instead of back at you, which your range neighbors will appreciate.
CMMG didn't just slap a brace on a short upper and call it done. The Mk4 ships with a full package of ZEROED components, including a single stage drop-in trigger, an ambidextrous 60/90 degree safety, ambi charging handle, ambi mag catch, extended mag release, and a polymer dust cover. The receivers are aluminum with a durable Armor Black Cerakote finish, and the EML7 handguard gives you M-LOK real estate on the sides and bottom plus more between the top Picatinny sections, so lights, lasers, and hand stops all have a home. The pistol-length gas system and direct impingement operation keep it cycling smoothly across a wide range of ammo.
The included six-position RipBrace is one of the better ideas to come out of the brace world. Instead of fiddling with an adjustment lever, you just pull and it extends straight to your preset length. That makes this Banshee genuinely quick to bring into action from a bag or truck setup while staying compact for storage.
A 30-round Magpul PMAG comes in the box, and the flat top receiver is ready for whatever red dot or optic setup you prefer, since no sights are installed from the factory. Like everything CMMG builds, it's made in the USA and backed by their Lifetime Quality Guarantee. For suppressed shooting, home setups, or just a seriously fun range gun, this one checks a lot of boxes.
Yes. The 8 inch barrel is threaded 5/8×24, which is the industry standard for .30 caliber suppressors and muzzle devices. The factory ZEROED linear compensator removes easily when you want to mount a can, and the short barrel with subsonic ammo is one of the best suppressed combinations out there.
The Banshee Mk4 uses a pistol-length gas system tuned to run a wide range of .300 BLK loads, and the 1:7 twist barrel stabilizes everything from light supersonic rounds up to heavy 220 grain subsonics. As with any 300 BLK gun, some unsuppressed subsonic loads can be finicky in semi-autos, so it's worth testing your preferred ammo. Most owners report reliable cycling with quality factory loads.
No, this model ships optics ready with no sights installed. The flat top Picatinny rail on the receiver and handguard gives you plenty of room to mount a red dot, magnifier, or backup irons. A compact red dot is the most popular setup on a pistol this size.
The RipBrace is CMMG's six-position adjustable brace with a spring-loaded deployment feature. Set your preferred length once, and from the collapsed position you simply pull it straight back and it stops at your preset. It gets the gun into action faster than a standard adjustable brace without giving up compact storage size.
| UPC | 810148623531 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 30AF20A-AB |
| Action | |
| Barrel Length | 8'' |
| Caliber/Gauge | .300 AAC Blackout |
| Capacity | 30 |
| Color | Black |
| Length | 3.5'' |
| Magazine Included | 1 x 30-Round |
| Model | |
| Number of Magazines | 1 |
| Product Type | AR |
| Safety | Thumb |
| Shipping Weight | 10.5 |
| Sights | Optics Ready |
| Sights Type | NONE |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
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