CMMG Dissent MK4 .22 ARC

The CMMG Dissent MK4 takes the 22 ARC cartridge and packages it into the most compact folding AR-15 configuration currently available. Built around CMMG’s Radial Delayed Blowback system – which eliminates the buffer tube entirely – the Dissent makes a folding stock genuinely functional rather than a gimmick. At $1,800–1,950 street price, you’re paying a meaningful premium over CMMG’s own Resolute for that folding capability. Whether that premium makes sense depends entirely on what you need this rifle to do.

Quick Verdict: CMMG Dissent MK4 .22 ARC

✓ Best for: Suppressor hosts, truck guns, and packable semi-auto builds
✓ Price: $1,800–$1,950 street
✓ Key strength: Folding bufferless design at 26" OAL folded – most compact 22 ARC semi-auto available
✗ Not ideal for: Budget buyers or long-range varmint work beyond 500 yards

Real-World Performance – Accuracy & Reliability

The CMMG Dissent MK4 22 ARC delivers honest 1.0–1.5 MOA accuracy at 100 yards with the factory ~6 lb single-stage trigger – acceptable for a truck gun or suppressor host, but not competitive for precision work. Swap in a Geissele SSA-E and that tightens to 0.7–1.0 MOA, which is where the platform’s real capability shows. The 16.1" barrel with 1:7 twist pushes 88gr ELD-M at roughly 2,700–2,800 fps and 75gr ELD-M near 2,900 fps – enough for practical varmint work to 400–500 yards, though the 22 ARC’s long-range ballistic advantage over smaller cartridges starts fading past that point from this barrel length. The Radial Delayed Blowback system handles suppressor back-pressure reliably, which matters because suppressed use is the primary reason most buyers are looking at this rifle. Reliability has been consistent across factory loads, and the bufferless action cycles cleanly without the timing issues that can plague short-barreled conventional AR builds running suppressed.

Applications & Use Cases for the Dissent MK4

Suppressed compact host: The CMMG Dissent MK4 22 ARC was essentially designed for this role. A 16.1" barrel plus a compact can like the SilencerCo Omega 300 at 7.9" gives you roughly 24" of barrel section – fold the stock and you’re at approximately 30" total OAL, which is the most packable hearing-safe 22 ARC configuration currently on the market. The Radial Delayed Blowback handles the added back-pressure without adjustment.

Vehicle and truck gun: At 26" folded, the Dissent fits in vehicle storage compartments that would reject a standard AR-15 with buffer tube. For patrol officers or rural property owners who want a semi-auto intermediate cartridge in a genuinely stowable package, this is a practical solution rather than a range novelty.

Range bag carry: Folded, the Dissent fits in most standard range bags. This sounds minor until you’re actually trying to move a rifle discreetly through a parking lot or store it in a small apartment – the 26" folded OAL is a real-world advantage.

Long-range varmint: This is where the Dissent falls short. The 16.1" barrel limits velocity enough that 600-yard-plus work becomes marginal. If long-range varminting is your primary use, the CMMG Endeavor MK4 22 ARC with its 20" barrel is the better tool at $500 less.

Ergonomics & Handling – Folding Stock in Practice

The CMMG Dissent MK4 22 ARC handles well at 6.2 lbs – light enough to carry comfortably but with enough mass to manage 22 ARC recoil without issue. The folding aluminum stock locks up solidly in both positions with no perceptible wobble when deployed, and the collapsible cheekpiece adjusts to accommodate optics without forcing an awkward head position. The M-LOK handguard provides a clean, slim profile that works well with or without accessories. One honest note: the bufferless action has a slightly different feel during cycling than a standard AR-15 – not worse, just different – and shooters coming from a conventional buffer system will notice it during the first range session. The 5/8×24 threaded muzzle is correctly positioned for suppressor mounting without adapters on most common cans.

Aftermarket & Upgrade Path for the Dissent MK4

The CMMG Dissent MK4 22 ARC benefits immediately from a trigger swap – the factory ~6 lb pull is the single biggest limiter on accuracy, and a Geissele SSA-E at $240 or a TriggerTech AR at $200 transforms the shooting experience. Beyond that, the standard AR-15 PMAG ecosystem means magazine compatibility is a non-issue. Optic selection should match the rifle’s role: a Trijicon MRO or Aimpoint Micro T-2 for fast close-range suppressed use, or a 1–6× LPVO if you want to stretch the 22 ARC toward its 400–500 yard practical limit. The suppressor pairing is the most impactful upgrade – the Dead Air Wolfman at $900 is a compact, lightweight match for this platform. A quick-attach two-point sling completes the package for vehicle or pack carry with the stock folded.

Pros & Cons of the CMMG Dissent MK4 .22 ARC

Strengths:
✓ 26" folded OAL – most compact 22 ARC semi-auto configuration available
✓ Bufferless Radial Delayed Blowback enables true folding stock functionality
✓ 6.2 lbs – lightest CMMG 22 ARC configuration
✓ Reliable suppressor cycling without adjustment
✓ Standard AR-15 PMAG compatibility
✓ 5/8×24 threaded barrel – no adapter needed for most suppressors
✓ Multiple Cerakote finishes including Midnight Bronze and Charcoal Green
✓ 0.7–1.0 MOA potential with trigger upgrade

Limitations:
✗ $1,800–1,950 – $400 premium over the Resolute for folding capability alone
✗ Factory ~6 lb trigger requires immediate replacement for any precision use
✗ 16.1" barrel limits 22 ARC to 400–500 yard practical varmint range
✗ Bufferless operation is unfamiliar to standard AR-15 users
✗ 10-round factory magazine – low capacity for some applications
✗ Folding stock premium is wasted if compact storage isn’t a genuine requirement
✗ Slightly more accuracy variability than standard buffer-equipped AR platforms

Competitors & Alternatives – How It Stacks Up

The CMMG Resolute MK4 22 ARC is the most direct comparison – same barrel, same caliber, $400 less, and no folding stock. If you don’t specifically need the folding capability, the Resolute delivers identical ballistic performance and saves real money. The CMMG Endeavor MK4 22 ARC goes the other direction – $500 less with a 20" barrel that actually unlocks the cartridge’s long-range potential, making it the better choice for varmint-focused buyers. The Seekins Precision DMR 22 ARC competes at similar or higher pricing and targets precision semi-auto shooters rather than compact-carry buyers – different mission entirely.

Who Should Buy the CMMG Dissent MK4 .22 ARC

The CMMG Dissent MK4 22 ARC is the right rifle for buyers who have a specific need for a folding, suppressor-ready semi-auto in an intermediate cartridge – suppressor hunters who store rifles in vehicles or packs, law enforcement needing a compact patrol carbine, or shooters who genuinely can’t accommodate a standard AR-15’s fixed OAL. If compact folded storage is a real operational requirement, the $400 premium over the Resolute is justified. Look elsewhere if you’re a long-range varmint shooter – the 16.1" barrel limits the 22 ARC’s range advantage, and the CMMG Endeavor MK4 22 ARC serves that role better for $500 less.

Frequently Asked Questions – Dissent MK4 .22 ARC

Q: Can you fire the Dissent MK4 with the stock folded?
A: No. The stock must be deployed to fire. Folded OAL is for storage and transport only.

Q: Does the bufferless design require special maintenance?
A: The Radial Delayed Blowback system is cleaned similarly to a standard AR-15 but lacks a buffer and spring – familiarize yourself with CMMG’s specific disassembly procedure before first use.

Q: What suppressor pairs best with the Dissent MK4?
A: The Dead Air Wolfman is a compact, lightweight match. The SilencerCo Omega 300 also works well and keeps overall length manageable.

Q: Is the 22 ARC hearing-safe suppressed from 16.1"?
A: Potentially, depending on ammunition – subsonic loads are not practical in 22 ARC, but suppressed supersonic 22 ARC from 16.1" approaches hearing-safe thresholds with the right can.

Q: Does the Dissent MK4 accept standard AR-15 magazines?
A: Yes – standard AR-15 PMAGs and most AR-15 pattern magazines are compatible.

Q: What is the effective varmint range from the 16.1" barrel?
A: Practical maximum is 400–500 yards with 75–88gr loads. Beyond that, velocity loss from the shorter barrel reduces terminal performance noticeably.

Final Verdict: Is the CMMG Dissent MK4 Worth It?

The CMMG Dissent MK4 22 ARC is a purpose-built compact suppressor host and vehicle carbine – and it executes that specific role better than anything else in the 22 ARC market. The $400 premium over the Resolute is only justified if folding storage is a genuine operational need rather than a novelty. Buy it for the compact folded OAL and suppressor reliability; don’t buy it expecting long-range varmint performance from a 16.1" barrel.

The CMMG Dissent MK4 22 ARC fills a narrow but real niche – the most packable semi-auto 22 ARC available. It’s not the right tool for every buyer, and the premium pricing demands an honest assessment of whether you’ll actually use the folding capability. For suppressor-focused buyers and those with genuine compact-carry requirements, it earns its price. For everyone else, the Resolute or Endeavor deliver the same cartridge for significantly less money.