The CMMG Banshee Mk4 9mm 5″ M-LOK RipBrace Pistol 30rd is a compact AR-pattern pistol that brings familiar controls and proven reliability to the 9mm platform. Built on CMMG’s Mk4 upper and lower receivers, this pistol uses the company’s radial delayed blowback system with a fixed ejector to reduce recoil and improve reliability. The 5-inch threaded barrel keeps the package short for close-quarters use, while the RipBrace pistol brace and EML4 M-LOK handguard provide a stable shooting platform. A 30-round 9ARC magazine is included where permitted.
| Manufacturer | CMMG |
|---|---|
| Model | Banshee Mk4 9mm Pistol |
| Material | 7075-T6 aluminum upper and lower receivers, steel barrel and bolt |
| Compatibility | CMMG 9ARC magazines (9mm); accepts CMMG 9mm conversion magazines |
| Finish | Black hardcoat anodized |
| Weight | 4.7 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Radial Delayed Blowback System — CMMG’s proprietary radial delayed blowback cuts felt recoil by up to 30% compared to straight blowback 9mm pistols, making it easier for newer shooters to stay on target.
- RipBrace Pistol Brace — The integrated RipBrace provides a stable cheek weld and arm brace support, ideal for shooters who want a rifle-like feel without a stock.
- EML4 M-LOK Handguard — The 4-inch M-LOK handguard lets you mount lights, lasers, or grips without adding bulk, keeping the pistol slim and maneuverable.
- Ambidextrous Controls — Ambidextrous safety selector, bolt catch, and charging handle make this pistol equally comfortable for left- and right-handed shooters.
- 5-Inch Threaded Barrel — The 1/2×28 threaded barrel accepts standard 9mm muzzle devices or suppressors, giving you options for noise reduction or flash suppression.
Who It’s For
The CMMG Banshee Mk4 9mm pistol is built for families and new shooters who want a reliable, low-recoil platform that works like the AR-15 they already know. It’s also a great choice for home defense, plinking, and range training because the 9mm ammunition is affordable and easy to find. If you’re teaching a spouse or older teen how to handle a pistol-caliber carbine, this setup gives them confidence without punishing recoil.
Pros & Cons
- Pro: Very soft recoil thanks to the radial delayed blowback — one of the smoothest 9mm AR pistols we’ve tested.
- Pro: Familiar AR-15 manual of arms means no learning curve for anyone who’s shot a standard AR.
- Pro: Accepts CMMG 9ARC magazines, which are reliable and widely available.
- Con: The 5-inch barrel limits muzzle velocity compared to longer barrels, but it’s still effective for home defense distances out to 50 yards.
Comparison vs. Competitors
| Feature | CMMG Banshee Mk4 9mm | Zev Technologies OZ9C | Agency Arms AOS G19 |
|---|---|---|---|
| Caliber | 9mm | 9mm | 9mm |
| Operating System | Radial delayed blowback | Striker-fired (Glock pattern) | Striker-fired (Glock pattern) |
| Barrel Length | 5″ | 4.5″ | 4.0″ |
| Brace/Stock | RipBrace pistol brace | None (pistol frame) | None (pistol frame) |
| Magazine Capacity | 30 rounds | 17 rounds | 15 rounds |
| Price | $1586.31 | ~$1800 | ~$1600 |
FAQ
Is the CMMG Banshee Mk4 9mm legal in my state?
This pistol ships as a pistol brace model and complies with federal law. However, some states restrict magazine capacity over 10 rounds or have specific pistol brace laws. Please check your local and state regulations before ordering. We ship to all 50 states, but restrictions may apply.
What magazines does this pistol use?
It uses CMMG 9ARC magazines (included 30-rounder) and is compatible with CMMG 9mm conversion magazines. These are standard AR-style mags modified for 9mm, so they feel and operate like your regular AR mags.
Can I use this for home defense?
Absolutely. The 5-inch barrel keeps it maneuverable in tight spaces, and the 9mm round is effective for self-defense. The RipBrace gives you a stable platform, and the radial delayed blowback keeps recoil low for fast follow-up shots.
Is the barrel threaded?
Yes, the barrel is 1/2×28 threaded and comes with a thread protector. It accepts standard 9mm muzzle devices or suppressors.
Order With Confidence
- ✅ Nationwide delivery (all 50 states)
- ✅ Ships 1-2 business days
- ✅ 30-day returns
- ✅ Secure checkout
Last updated: April 2026
Explore more: AR Pistols | 9mm Pistols | CMMG Firearms
FFL Transfer & Firearms Laws for CMMG Banshee MK4 9mm 5″ M-LOK RipBrace Pistol 30rd
All firearms, including the CMMG Banshee MK4 9mm 5″ M-LOK RipBrace Pistol 30rd, 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 9mm 5″ M-LOK RipBrace Pistol 30rd 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 9mm 5″ M-LOK RipBrace Pistol 30rd 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 9mm 5″ M-LOK RipBrace Pistol 30rd?
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 9mm 5″ M-LOK RipBrace Pistol 30rd 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 9mm 5″ M-LOK RipBrace Pistol 30rd, 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 9mm 5″ M-LOK RipBrace Pistol 30rd 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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