The CMMG 28A670CMB Resolute MK4 22ARC 16.1 MDBRZ is a carbine-length AR-15 built for families and shooters who want reliable long-range performance without the bulk of a full-size rifle. Chambered in 22 ARC, this rifle combines a lightweight Mk4 platform with CMMG’s ZEROED parts and RipStock to help new shooters stay comfortable and accurate at the range.
| Manufacturer | CMMG |
|---|---|
| Model | Resolute MK4 22ARC 16.1 MDBRZ |
| Material | 7075-T6 aluminum upper and lower receiver (per manufacturer specs) |
| Compatibility | 22 ARC ammunition, standard AR-15 magazines |
| Finish | Medium Bronze Cerakote (MDBRZ) |
| Weight | 6.8 lbs (unloaded, per CMMG specifications) |
| Condition | New |
Key Features
- ZEROED Parts Suite — CMMG includes their ZEROED trigger, safety, and charging handle from the factory, so you get a crisp trigger pull and smooth operation right out of the box without upgrading.
- RipStock — This adjustable stock lets you set the length of pull quickly, making it easy for smaller frames or youth shooters to shoulder the rifle comfortably.
- EML 15-inch Handguard — The slim, free-floating handguard has M-LOK slots at 3, 6, 9, and 12 o’clock, so you can mount lights, grips, or bipods wherever they balance best.
- 16.1-inch Barrel in 22 ARC — The 22 ARC cartridge delivers flat trajectories and less recoil than 5.56, helping beginners stay on target and build confidence at distance.
- Medium Bronze Cerakote Finish — The durable MDBRZ coating resists wear from weather and range use, keeping the rifle looking sharp for years.
Who It’s For
This rifle is built for families teaching new shooters, youth shooters stepping up from a .22 LR, and anyone who wants a lightweight, low-recoil AR for target shooting or varmint control. The carbine length makes it easy to handle in tight spaces or from a bench rest.
Pros and Cons
- Pro: Low recoil and accurate 22 ARC cartridge help beginners learn proper form without flinching.
- Pro: Adjustable RipStock and slim handguard fit a wide range of body sizes, from teens to adults.
- Pro: Factory ZEROED parts mean no immediate upgrades needed — just add optics and ammo.
- Con: 22 ARC ammunition is less common than 5.56, so you may need to order online or stock up in advance.
Comparison: CMMG Resolute MK4 vs. Geissele Super Duty vs. Zev Technologies AR-15
| Feature | CMMG Resolute MK4 22ARC | Geissele Super Duty 5.56 | Zev Technologies AR-15 5.56 |
|---|---|---|---|
| Caliber | 22 ARC | 5.56 NATO | 5.56 NATO |
| Barrel Length | 16.1 in | 16 in | 16 in |
| Weight | 6.8 lbs | 7.2 lbs | 6.5 lbs |
| Stock | RipStock (adjustable) | Super 42 buffer system | Mil-spec carbine stock |
| Handguard | EML 15 in M-LOK | MK16 13.5 in M-LOK | Zev M-LOK 15 in |
| Recoil | Very low | Moderate | Moderate |
| Best For | Family training, youth, varmint | Duty, competition | Custom builds, precision |
Frequently Asked Questions
Does the CMMG 28A670CMB Resolute MK4 22ARC come with a magazine?
Yes, the rifle includes one 10-round magazine to get you started. The 22 ARC uses standard AR-15 magazines, so you can use any compatible mags you already own.
Is the 22 ARC good for teaching kids to shoot?
Absolutely. The 22 ARC has about half the recoil of 5.56, so young or new shooters can stay comfortable and focus on sight alignment and trigger control. The adjustable RipStock also helps fit smaller frames.
Can I mount a scope or red dot on this rifle?
Yes, the upper receiver has a Picatinny rail for mounting optics. The handguard’s top M-LOK slots let you add a small section of rail for backup sights or a light.
What is the barrel twist rate on this model?
Per CMMG specs, the 16.1-inch barrel has a 1:7 twist rate, optimized for stabilizing 22 ARC bullets from 55 to 75 grains.
Trust and Convenience
- ✅ Nationwide delivery to all 50 states
- ✅ Ships within 1–2 business days
- ✅ 30-day return policy
- ✅ Secure checkout with encryption
Looking for more options? Check out our AR Rifles or 22 ARC Ammunition. For youth-friendly gear, browse Youth Shooting Gear.
Last updated: April 2026
Buy Firearms Online – Reliable & Affordable
This CMMG 28A670CMB RESOLUTE MK4 22ARC 16.1 MDBRZ 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.
Why Choose the CMMG 28A670CMB RESOLUTE MK4 22ARC 16.1 MDBRZ?
- ✅ Quality guaranteed by top firearm manufacturers
- ✅ Ships fast across the USA
- ✅ Legal compliance and background-check ready
Buy Firearms Near Me – Nationwide Delivery
No matter your location, we ship to all 50 states. Looking for where to buy Accessories near you? FRT-15.com brings the best selection to your door, legally and securely.
Shipping & Return Policy
- 📦 Fast shipping within 1–3 business days
- 🔁 30-day return policy for unused, unmodified items
- 💬 Questions? Contact our support team
Related Firearms
Explore more options: handguns, rifles, shotguns, and trigger kits.
Reviews
There are no reviews yet.