The CMMG Mk4 Dissent Rifle 5.56mm 30rd Magazines (2) 14.5" Pinned and Welded Barrel Black with 13.5" Handguard is a purpose-built, bufferless AR platform that delivers full-size performance in a compact, tax-stamp-free package. With a pinned and welded muzzle brake bringing the overall barrel length to 16.1 inches, this rifle qualifies as a standard firearm while offering the handiness of a 14.5-inch barrel. It ships with two 30-round magazines and CMMG’s innovative side-folding stock, making it an ideal choice for home defense, truck gun, or family range day.
| Manufacturer | CMMG |
|---|---|
| Model | Mk4 Dissent |
| Material | 7075-T6 aluminum upper and lower receiver, steel barrel |
| Compatibility | 5.56mm NATO / .223 Remington, uses standard AR-15 magazines |
| Finish | Black anodized |
| Weight | Approximately 6 lbs 12 oz (per manufacturer specs) |
| Condition | New |
Key Features
- Bufferless Action — No buffer tube means you get a true side-folding stock without any extra adapters. This keeps the rifle compact for storage in a safe or range bag.
- Pinned and Welded SVD Brake — The ZEROED SVD brake is permanently attached, bringing the barrel to 16.1 inches overall. Why it matters: You avoid NFA paperwork and a tax stamp while keeping the short-barrel handling.
- 13.5-inch M-Lok Handguard — Full-length top rail and M-Lok slots let you mount lights, grips, or a bipod exactly where your support hand wants them. Why it matters: Your family’s shooting coach teaches that a well-fit handguard improves accuracy and control.
- Adjustable Stock — Length of pull and cheek riser adjust without tools, so a smaller shooter or a taller family member can both get a proper cheek weld. Why it matters: Proper fit means better accuracy and more comfortable shooting sessions.
- Two 30-Round Magazines Included — You get two CMMG-branded magazines out of the box, saving you a trip to the store. Why it matters: More time shooting, less time shopping.
Who It’s For
This rifle is built for the shooter who wants one do-it-all platform without the hassle of a tax stamp. It’s perfect for families who train together, because the adjustable stock fits multiple shooters. Beginners will appreciate the familiar AR-15 manual of arms, while experienced shooters will value the compact, bufferless design. If you’re looking for a reliable 5.56mm rifle that stores easily in a vehicle or home safe, this is your pick.
Pros and Cons
- Pro: No buffer tube means the stock folds to the side, reducing overall length by about 8 inches for transport.
- Pro: The pinned and welded brake eliminates the need for a tax stamp while still using a 14.5-inch barrel.
- Pro: Two included magazines save you $30–$50 right out of the gate.
- Con: Aftermarket parts like handguards are specific to the Dissent platform, so you won’t be able to swap in standard AR-15 handguards without modification.
Comparison
| Feature | CMMG Mk4 Dissent | Geissele Super Duty 14.5 | Agency Arms AAR 14.5 |
|---|---|---|---|
| Bufferless | Yes | No | No |
| Barrel Length (pinned) | 14.5” (16.1” overall) | 14.5” (16.1” overall) | 14.5” (16.1” overall) |
| Stock Type | Side-folding, adjustable | Standard carbine | Standard carbine |
| Included Magazines | 2 | 1 | 1 |
| Price | $2,097.65 | $2,150.00 | $2,300.00 |
FAQ
Does this rifle require a tax stamp?
No. The 14.5-inch barrel has a ZEROED SVD brake pinned and welded to a total length of 16.1 inches, making it a standard rifle under federal law. No NFA tax stamp or registration is needed.
Will standard AR-15 magazines work with this?
Yes. The CMMG Mk4 Dissent uses standard AR-15/M16 pattern magazines. It ships with two 30-round CMMG magazines, but any quality mag from Magpul, Lancer, or Okay Industries will function perfectly.
Can I change the handguard to a different length?
The handguard is specific to the Dissent platform. CMMG offers a few factory options, but standard AR-15 handguards will not fit due to the bufferless design. Check with CMMG for compatible accessories.
Is this rifle suitable for a beginner shooter?
Absolutely. The adjustable stock and cheek riser allow you to fit the rifle to a smaller or larger shooter. The recoil is mild with 5.56mm, and the side-folding stock makes it easy to store and transport. As a family shooting coach, I recommend this as a first AR for responsible beginners.
Trust Block
- ✔ Nationwide delivery (all 50 states)
- ✔ Ships 1-2 business days
- ✔ 30-day returns
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Last updated: April 2026
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This CMMG Mk4 Dissent Rifle 5.56mm 30rd Magazines (2) 14.5″ Pinned and Welded Barrel Black with 13.5″ Handguard is ideal for shooters looking to buy guns online with confidence. Built with precision engineering and tested performance, it’s a top-tier choice whether you're looking for home defense, sport shooting, or a trusted everyday carry.
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