The cmmg dissent mk4 pistol — .300 aac blackout 10.5″ mb is a compact, semi-automatic AR-style pistol built for shooters who want a short-barrel platform that handles both supersonic and subsonic 300 BLK loads without a hiccup. With a 10.5″ threaded barrel, adjustable gas block, and Cerakote Midnight Bronze finish, this pistol delivers reliable performance in a package that’s easy to pack and shoot.
| Manufacturer | CMMG |
|---|---|
| Model | Dissent MK4 Pistol — .300 AAC Blackout 10.5″ MB |
| Material | Aluminum upper and lower receiver, steel barrel (per manufacturer specs) |
| Compatibility | Accepts standard AR-pattern grips and triggers; 1913 Picatinny rear end plate for brace or stock |
| Finish | Cerakote Midnight Bronze |
| Weight | Approximately 5.6 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Adjustable Gas Block — Why it matters: Lets you tune the action for supersonic or subsonic ammo, so the pistol cycles reliably with a wider range of 300 BLK loads.
- 10.5″ Threaded Barrel — Why it matters: Keeps the overall length short for easy handling, while the threading allows you to attach a suppressor or muzzle device for quieter shooting.
- TriggerTech AR-D Trigger (CMMG Collaboration) — Why it matters: Gives you a crisp, repeatable trigger pull that helps new shooters build accuracy without a heavy or gritty break.
- Cerakote Midnight Bronze Finish — Why it matters: This durable coating resists rust, scratches, and wear, so the pistol stays looking good even after trips to the range or field.
- Rear 1913 Picatinny End Plate — Why it matters: Lets you quickly attach a folding pistol brace or stock (with proper tax stamp) to adapt the pistol to your shooting style or storage needs.
Who It’s For
This pistol is for families and beginners who want a compact AR-style platform that’s easy to learn on and versatile enough for home defense or plinking. It’s also a solid choice for youth shooters stepping up to centerfire because the adjustable gas block lets you dial down felt recoil with subsonic loads.
Pros and Cons
- Pro: The adjustable gas block means you can switch between supersonic and subsonic ammo without swapping parts — just turn a screw.
- Pro: The TriggerTech trigger is one of the lightest, cleanest triggers out of the box on any AR pistol under $2,000.
- Con: The 10.5″ barrel means muzzle velocity is lower than a 16″ rifle, so if you’re shooting past 200 yards, you’ll see a drop in energy and accuracy. Per CMMG specs, this is optimized for close-to-mid range work.
Comparison: CMMG Dissent MK4 vs. Competitors
| Feature | CMMG Dissent MK4 | Zev Technologies OZ9C | Agency Arms AOS Glock 19 |
|---|---|---|---|
| Caliber | .300 AAC Blackout | 9mm | 9mm |
| Barrel Length | 10.5″ | 4.5″ | 4.02″ |
| Gas System | Adjustable | Fixed (blowback) | Fixed (blowback) |
| Trigger | TriggerTech AR-D (3.5-4.5 lbs) | Standard Glock-style | Standard Glock-style |
| Weight (unloaded) | ~5.6 lbs | ~1.8 lbs | ~1.5 lbs |
| Finish | Cerakote Midnight Bronze | Black nitride | Black DLC |
| Price | $1778.59 | ~$1,500 | ~$1,300 |
The CMMG Dissent MK4 stands out because it’s chambered in .300 AAC Blackout, giving you more flexibility for subsonic and suppressed shooting than the 9mm pistols from Zev and Agency Arms. However, the Zev and Agency options are lighter and more concealable if you carry daily.
FAQ
What’s the difference between supersonic and subsonic .300 Blackout?
Supersonic rounds travel faster than the speed of sound (over 1,100 fps) and have a crack as they pass. Subsonic rounds stay below that speed, making them quieter, especially with a suppressor. The Dissent’s adjustable gas block lets you run both types reliably.
Can I put a stock on this pistol?
Yes, the rear 1913 Picatinny end plate allows you to attach a folding stock or brace. If you add a stock with a barrel under 16″, you’ll need a tax stamp from the ATF. A pistol brace is fine without one.
Is this pistol good for a beginner?
Absolutely. The TriggerTech trigger is light and predictable, and the adjustable gas block lets you use lower-recoil subsonic rounds to build confidence. Just make sure you get training on safe handling and manual of arms first.
What ammo should I use for home defense?
For home defense, many shooters prefer subsonic .300 Blackout because it’s quieter and has less overpenetration through drywall. Start with a quality hollow point load like Hornady or Barnes.
Get Your CMMG Dissent MK4 Pistol Today
Order the cmmg dissent mk4 pistol — .300 aac blackout 10.5″ mb from our store and get a compact, tunable AR pistol that’s ready for the range or home defense. We ship to all 50 states, and our team backs every purchase with fast shipping and easy returns.
- ✓ Nationwide delivery (all 50 states)
- ✓ Ships 1-2 business days
- ✓ 30-day returns
- ✓ Secure checkout
Browse more AR Pistols or check out our 300 Blackout Ammunition and AR Parts to complete your setup.
Last updated: April 2026
FFL Transfer & Firearms Laws for CMMG Dissent MK4 Pistol — .300 AAC Blackout 10.5″ MB
All firearms, including the CMMG Dissent MK4 Pistol — .300 AAC Blackout 10.5″ MB, 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 — .300 AAC Blackout 10.5″ MB 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 — .300 AAC Blackout 10.5″ MB 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 — .300 AAC Blackout 10.5″ MB?
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 — .300 AAC Blackout 10.5″ MB 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.
Be the first to review “CMMG Dissent MK4 Pistol — .300 AAC Blackout 10.5″ MB”
FFL Transfer & Firearms Laws
All firearms, including the CMMG Dissent MK4 Pistol — .300 AAC Blackout 10.5″ MB, 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 — .300 AAC Blackout 10.5″ MB 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.
Reviews
There are no reviews yet.