Compact Personal Defense: CMMG Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1
The CMMG Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1 redefines what a compact AR-style pistol can be. By removing the traditional buffer tube with CMMG’s patent-pending Compact Action, this platform shrinks to an overall length of just 14.70 inches while keeping the hard-hitting 5.56x45mm NATO round. At 4.60 lbs unloaded, it’s built for easy carry, quick storage, and reliable performance in close-quarters or family defense situations.
| Manufacturer | CMMG |
|---|---|
| Model | Dissent Mk4 |
| Material | 7075-T6 aluminum upper and lower receiver, steel barrel |
| Compatibility | Standard AR-15 magazines (30+1 capacity included) |
| Finish | Hardcoat anodized black |
| Weight | 4.60 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Buffer-less Compact Action: Why it matters: This patent-pending design removes the buffer tube entirely, cutting overall length to 14.70 inches while keeping a full 5.56x45mm chambering. It’s easier to store in a small safe, backpack, or vehicle console without sacrificing power.
- 6.50-inch Free-Floated Barrel: Why it matters: A shorter barrel keeps the pistol compact for maneuvering in tight spaces, while the free-float design improves accuracy by preventing barrel contact with the handguard. Perfect for defensive shots at home-defense distances.
- Optic-Ready Top Rail: Why it matters: The full-length Picatinny rail lets you mount a red dot or reflex sight without extra adapters. Quick target acquisition is critical for newer shooters or low-light situations, and this rail makes setup simple.
- 30+1 Round Capacity: Why it matters: With a standard 30-round magazine, you have 31 rounds on tap before reloading. That extra capacity provides peace of mind for family defense or range practice without constant magazine changes.
Who It’s For
The CMMG Dissent Mk4 is built for shooters who want a compact, reliable AR-style pistol without the bulk of a traditional buffer tube. It’s ideal for families looking for a home-defense firearm that’s easy to handle for smaller-statured shooters, youth hunters transitioning to centerfire, or beginners who want a lighter, more maneuverable platform. Its buffer-less design also makes it a strong choice for truck or backpack carry.
Pros and Cons
- Pro: Ultra-compact 14.70-inch overall length — fits in small spaces where full-size ARs won’t.
- Pro: Buffer-less system means no recoil spring noise or wear, and easier disassembly for cleaning.
- Pro: Full 5.56x45mm power in a pistol package — no need to step down to weaker calibers.
- Con: The short 6.50-inch barrel reduces muzzle velocity compared to longer barrels, so effective range is limited to about 150-200 yards. This isn’t a long-range rifle; it’s a close-quarters tool.
How It Stacks Up
| Feature | CMMG Dissent Mk4 | Zev Technologies OZ9 Pistol | Geissele Super Duty Pistol |
|---|---|---|---|
| Caliber | 5.56x45mm NATO | 9mm | 5.56x45mm NATO |
| Barrel Length | 6.50 inches | 4.5 inches | 10.3 inches |
| Overall Length | 14.70 inches | 7.5 inches | 26.5 inches |
| Weight (unloaded) | 4.60 lbs | 1.8 lbs | 5.8 lbs |
| Buffer System | Buffer-less (Compact Action) | Standard recoil spring | Standard buffer tube |
| Capacity | 30+1 | 17+1 | 30+1 |
| Price | $1,778.59 | ~$1,400 | ~$2,000 |
The Zev OZ9 is a traditional 9mm pistol with a longer grip and standard recoil system — it’s lighter but less powerful. The Geissele Super Duty is a full-size AR pistol with a 10.3-inch barrel and buffer tube, making it bulkier and heavier. The CMMG Dissent Mk4 splits the difference: rifle-caliber power in a package that’s nearly as compact as a large handgun.
Frequently Asked Questions
Is the CMMG Dissent Mk4 legal to own in my state?
This pistol is designed to comply with federal pistol laws, but state and local regulations vary. Check your local laws regarding barrel length, overall length, and magazine capacity. We ship to all 50 states, but some restrictions may apply — contact us if you have specific questions.
Does this pistol come with a brace or any attachment for the rear?
The CMMG Dissent Mk4 ships as a bare pistol with no brace or stabilizer. The rear is a flat plate, so you can add an arm brace or other accessories per your local laws. Many shooters choose to mount a pistol brace for easier one-handed shooting.
Can I use standard AR-15 magazines with this pistol?
Yes. The CMMG Dissent Mk4 accepts any standard AR-15 magazine, including 30-round, 20-round, or 10-round magazines. It ships with one 30-round magazine.
How difficult is it to clean the Dissent Mk4 without a buffer tube?
Cleaning is actually easier than a traditional AR. Without a buffer tube, the upper receiver slides off the lower without needing to compress a recoil spring. The Compact Action uses a self-contained recoil system, so you can clean the bolt and chamber without disassembling the stock. Per CMMG’s manual, field stripping takes under a minute.
Is this a good first AR-style pistol for a beginner?
Absolutely. The compact size reduces overall weight and makes it easier to control for newer shooters. The lack of a buffer tube also means there’s less length to manage, and the 5.56x45mm round is manageable with proper training. Just remember to start with ear and eye protection, and take a basic safety course.
Ready to Add the CMMG Dissent Mk4 to Your Collection?
The CMMG Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1 is a smart choice for anyone wanting a compact, powerful, and easy-to-maintain AR-style pistol. Whether you’re outfitting a home-defense setup, a range toy, or a truck gun, this buffer-less design delivers real advantages in size and simplicity.
- ✅ Nationwide delivery (all 50 states)
- ✅ Ships 1-2 business days
- ✅ 30-day returns
- ✅ Secure checkout
Browse more options in our AR Pistols category or check out CMMG Dissent Parts for accessories. Shop all firearms for the whole family.
Last updated: April 2026
FFL Transfer & Firearms Laws for CMMG Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1
All firearms, including the CMMG Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1, 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 Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1 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 Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1 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 Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1?
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 Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1 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?
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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 Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1, 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 Dissent Mk4 Pistol 5.56x45mm 6.50in 30+1 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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