CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace
$1,708.58
The CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace is a compact, suppressor-ready AR pistol with factory-zeroed components, ambidextrous controls, and a 30-round Magpul PMAG — perfect for home defense, range training, and teaching new shooters.
The CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace is a compact AR pistol built for short-barrel and suppressed shooting. This ready-to-run platform ships factory-zeroed with a 7″ EML M-LOK handguard, ambidextrous controls, and a 30-round Magpul PMAG. It pairs the .300 AAC Blackout cartridge with an 8-inch threaded barrel and linear compensator for reduced recoil and flash.
| Manufacturer | CMMG |
|---|---|
| Model | Banshee Mk4 |
| Material | 7075-T6 aluminum upper and lower receiver (per manufacturer specs) |
| Compatibility | .300 AAC Blackout, standard AR-pattern grips and stocks |
| Finish | Hardcoat anodized black |
| Weight | 5.7 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- 8-inch threaded barrel with linear compensator — Why it matters: The short barrel keeps the pistol compact for vehicle or home defense, while the linear compensator directs blast forward, reducing felt recoil and muzzle rise for faster follow-up shots.
- 7-inch EML M-LOK handguard — Why it matters: The slim free-float handguard gives you plenty of rail space for lights, lasers, or grips, and keeps your support hand cool during rapid fire.
- Ambidextrous controls (safety selector, bolt catch, magazine release) — Why it matters: Left-handed or right-handed shooters can run the gun without switching hands, making it ideal for teaching new shooters or sharing between family members.
- Drop-in trigger with crisp 4.5-pound pull — Why it matters: A clean break helps beginners shoot tighter groups and builds confidence at the range, while experienced shooters appreciate the consistent reset.
- Factory-zeroed RipBrace — Why it matters: The adjustable brace provides a stable cheek weld for accurate shots, and it ships already sighted in so you can hit the range right out of the box.
Who It’s For
This CMMG Banshee is built for family shooters who want a compact, suppressor-ready pistol that’s easy to handle. It works well for home defense, plinking, and teaching new shooters the AR platform without the weight of a full-length rifle. The .300 AAC Blackout caliber also gives you the option to run subsonic ammo for quieter shooting.
Pros and Cons
- Pro: Factory-zeroed components save setup time — the pistol grip, trigger, and brace are all installed and tuned at the factory.
- Pro: Ambidextrous controls make it friendly for left-handed shooters or for passing between family members.
- Pro: Linear compensator reduces muzzle blast, which is helpful when shooting indoors or near others.
- Con: The 8-inch barrel limits muzzle velocity with supersonic .300 Blackout loads compared to longer barrels, so long-range accuracy drops past 200 yards.
Comparison: CMMG Banshee Mk4 vs. Competitors
| Feature | CMMG Banshee Mk4 .300 AAC Blackout 8″ | Zev Technologies OZ9C | Lone Wolf Distributors Alpha Wolf G19 |
|---|---|---|---|
| Caliber | .300 AAC Blackout | 9mm | 9mm |
| Barrel Length | 8 inches | 4.5 inches | 4.02 inches |
| Action | Semi-auto, direct impingement | Semi-auto, striker-fired | Semi-auto, striker-fired |
| Brace Included | Yes, RipBrace | No | No |
| Suppressor Ready | Yes, threaded barrel | No (pistol caliber) | No (pistol caliber) |
| Price | $1,525.52 | $1,299.00 | $599.00 |
The CMMG Banshee stands out for its suppressor-ready .300 Blackout chambering and included brace, making it a better option for quiet shooting and compact use than either the Zev or Lone Wolf pistols.
FAQ
Is the CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace California legal?
As of April 2026, this pistol is not on the California Roster of Handguns Certified for Sale, so it cannot be sold or shipped to a California resident unless it meets the state’s specific exemptions (e.g., single-shot conversion). Check your local laws before ordering.
Does the CMMG Banshee require a tax stamp for the brace?
No. The RipBrace is classified as a pistol brace, not a stock, so no ATF tax stamp is needed. You can install a standard stock only if you register it as a Short-Barreled Rifle (SBR) and pay the $200 tax stamp.
What magazines does the CMMG Banshee Mk4 use?
It ships with a 30-round Magpul PMAG and accepts all standard AR-pattern .300 AAC Blackout or 5.56 NATO magazines. The .300 Blackout rounds fit the same mags as 5.56, so you can use your existing AR mags.
Can I suppress the CMMG Banshee Mk4?
Yes. The 8-inch barrel is threaded 5/8×24 TPI, which is the standard for .30-caliber suppressors. The linear compensator is removable, so you can attach a suppressor directly. Running subsonic .300 Blackout ammo makes it very quiet.
✔️ Nationwide delivery (all 50 states)
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✔️ 30-day returns
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Last updated: April 2026
Per CMMG, the Banshee Mk4 has been one of the top-selling AR pistols in the compact suppressed market since its release, with over 15,000 units sold in 2025 alone.
Browse more AR Pistols or check out our Suppressors and AR Uppers.
FFL Transfer & Firearms Laws for CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace
All firearms, including the CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
Frequently Asked Questions About This Product
Why buy CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: AR Pistols.
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Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
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FFL Transfer & Firearms Laws
All firearms, including the CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace, must be shipped to a licensed Federal Firearms License (FFL) dealer. A background check and any required local paperwork must be completed before you can take possession.
How It Works
- Place your order online.
- Send us your preferred local FFL dealer info.
- We ship the firearm to your FFL after verification.
- Complete background check and pick up from your dealer.
Legal Compliance
We comply with all U.S. firearm laws. It is your responsibility to ensure the CMMG Banshee Mk4 .300 AAC Blackout 8″ RipBrace is legal in your state. Some states (e.g. CA, NY, NJ) have restrictions on magazine size or certain features.
Helpful Links
Need help? Contact our team — we’ll guide you through selecting a compliant firearm and the FFL transfer process.
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