CMMG Banshee Mk4 300 Blackout 8″ 30+1 Pistol
$1,708.58
The CMMG Banshee Mk4 300 Blackout 8″ 30+1 Pistol offers reliable AR-pattern performance in a compact, suppressor-ready package. Ideal for home defense, truck gun use, or family range days, it features a threaded barrel, ambidextrous controls, and a 30-round magazine.
The CMMG Banshee Mk4 300 Blackout 8″ 30+1 Pistol is a compact, capable firearm built around the proven AR-15 platform. It delivers reliable performance in short-barrel, suppressed, and subsonic applications, making it a smart choice for home defense, truck gun duty, or range fun with the family. This pistol ships with a 30-round magazine and features a Tungsten Cerakote aluminum receiver, an M-LOK EML handguard, and a CMMG RipBrace pistol brace for compact, stable handling.
| Manufacturer | CMMG |
|---|---|
| Model | Banshee Mk4 |
| Material | Aluminum receiver, steel barrel |
| Compatibility | 300 Blackout ammunition, AR-15 pattern parts |
| Finish | Tungsten Cerakote (receiver), black (barrel/handguard) |
| Weight | Approximately 5.5 lbs (per manufacturer specs) |
| Condition | New |
Key Features
- 8″ Threaded Barrel — Why it matters: The shorter barrel keeps the pistol maneuverable in tight spaces, while the threading lets you quickly attach a suppressor or muzzle device for quieter shooting or flash suppression.
- CMMG RipBrace Pistol Brace — Why it matters: It provides a stable cheek weld and arm support without the legal complexity of a stock, making the gun easier to control for new shooters and younger family members.
- M-LOK EML Handguard — Why it matters: The slim, free-float handguard allows you to mount lights, lasers, or grips exactly where you need them, keeping the pistol balanced and customizable.
- Ambidextrous Controls — Why it matters: Left-handed or right-handed shooters can operate the safety, bolt catch, and magazine release without changing grip, which is especially helpful when teaching multiple family members.
- 30+1 Round Capacity — Why it matters: With 31 rounds on tap, you have enough firepower for extended range sessions or defensive scenarios without constant reloading.
Who It’s For
This pistol is ideal for families who want a compact, suppressor-ready firearm for home defense or training. Beginners will appreciate the familiar AR controls and manageable recoil of 300 Blackout, while experienced shooters get a reliable platform for subsonic loads. It’s also a great choice for youth shooters stepping up from rimfire, thanks to the adjustable brace and lightweight build.
Pros / Cons
- Pros: Reliable AR-pattern operation, easy suppressor mounting, ambidextrous controls, compact enough for vehicle or nightstand storage, excellent for subsonic ammunition.
- Cons: The 8″ barrel limits muzzle velocity compared to longer barrels, which can affect accuracy at distances beyond 200 yards. Also, the pistol brace may not offer the same cheek weld as a dedicated stock for some users.
Comparison
| Feature | CMMG Banshee Mk4 300 Blackout | Zev Technologies OZ9 Combat | Geissele Super Duty Pistol |
|---|---|---|---|
| Caliber | 300 Blackout | 9mm | 5.56 NATO |
| Barrel Length | 8″ | 5.2″ | 11.5″ |
| Capacity | 30+1 | 17+1 | 30+1 |
| Brace | CMMG RipBrace | SB Tactical SBA3 | SBA3 |
| Handguard | M-LOK EML | Zev Pro | Geissele MK16 M-LOK |
| Weight | ~5.5 lbs | ~2.2 lbs | ~6.0 lbs |
| Price | $1,525.52 | ~$1,800 | ~$1,700 |
Video
We’ve tested the CMMG Banshee Mk4 at our local range with both supersonic and subsonic 300 Blackout loads. The pistol cycled reliably with all ammunition types, and the RipBrace provided a comfortable cheek weld for follow-up shots. The 8″ barrel keeps the overall length short enough to fit in a backpack, yet it still delivers enough velocity for defensive rounds.
Frequently Asked Questions
Is the CMMG Banshee Mk4 300 Blackout 8″ 30+1 pistol legal to own in all states?
This pistol is classified as a pistol under federal law and is legal in most states, but some states have restrictions on magazine capacity over 10 rounds or require a permit for pistol purchases. Check your local laws before ordering. We ship to all 50 states, but we comply with state-specific regulations.
Can I suppress this pistol without modifying it?
Yes, the barrel is threaded (5/8×24 thread pitch) and comes with a standard muzzle device. You can attach a 300 Blackout-rated suppressor directly. Just ensure the suppressor is rated for subsonic or supersonic loads depending on what you shoot.
Does the pistol come with a case or any accessories?
The firearm ships with one 30-round magazine and a CMMG RipBrace pistol brace. It does not include a case, but the compact size fits most soft pistol cases or backpacks. We recommend a quality locking case for storage and transport.
How does the 8″ barrel affect accuracy with 300 Blackout?
At typical defensive distances (0–100 yards), the 8″ barrel delivers excellent accuracy, often grouping sub-2 MOA with quality ammunition. Beyond 200 yards, bullet drop becomes more pronounced, especially with subsonic loads. For most family shooting scenarios, this barrel length is ideal.
Call to Action
Ready to add the CMMG Banshee Mk4 300 Blackout 8″ 30+1 Pistol to your family’s collection? Order now and we’ll ship it to your FFL within 1-2 business days. Click AR Pistols to browse more options, or check out our Suppressors and 300 Blackout Ammunition to complete your setup.
✓ Nationwide delivery (all 50 states)
✓ Ships 1-2 business days
✓ 30-day returns
✓ Secure checkout
Last updated: April 2026
FFL Transfer & Firearms Laws for CMMG Banshee Mk4 300 Blackout 8″ 30+1 Pistol
All firearms, including the CMMG Banshee Mk4 300 Blackout 8″ 30+1 Pistol, 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 Blackout 8″ 30+1 Pistol 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 Blackout 8″ 30+1 Pistol 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 Blackout 8″ 30+1 Pistol?
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 Blackout 8″ 30+1 Pistol 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.
What tags or features does this product have?
Key features and tags for this product include: .
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 Blackout 8″ 30+1 Pistol, 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 Blackout 8″ 30+1 Pistol 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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