Description
The CMMG MK AKS13 13″ Medium Tapered 4140 SBN Barrel Pinned Welded Krink Threaded 5/8-24 TPI Magpul MOE Pistol Grip Magpul CTR Stock 30rd is a factory-built, value-oriented AR-pistol chambered in 5.56 NATO. It features a 13-inch barrel with a permanently attached muzzle device to achieve a legal 16-inch overall length, making it a rifle without the NFA paperwork. This configuration delivers a handy, mid-length package with proven Magpul furniture at a competitive price point of $1414.60.
Key Features
- 13″ Barrel with Pinned & Welded Krink Brake: A 4140 steel, medium tapered barrel is permanently extended to a legal 16″+ overall length, avoiding SBR regulations.
- Magpul Furniture Suite: Comes ready with the popular MOE pistol grip and 6-position adjustable CTR stock for immediate comfort and control.
- Krink-Style Muzzle Threading (5/8-24 TPI): The welded device features standard threads, allowing for easy attachment of muzzle brakes, compensators, or suppressors.
- Complete, Ready-to-Run Rifle: This is a full firearm, not a parts kit. It ships with a 30-round magazine and is drop-in ready for your FFL transfer.
- Budget-Conscious Build Quality: Utilizes durable 4140 steel for the barrel and standard mil-spec components to keep costs down without sacrificing reliability.
Specifications & Details
| Caliber | 5.56 NATO / .223 Remington |
| Barrel Length | 13″ (16.1″ with pinned/welded device) |
| Barrel Material | 4140 Steel, Salt Bath Nitrided (SBN) |
| Muzzle Thread | 5/8-24 TPI (under Krink device) |
| Stock & Grip | Magpul CTR Stock & MOE Pistol Grip |
| Magazine Capacity | 30 Rounds (1 included) |
The core of this rifle is its 13-inch, medium-profile 4140 steel barrel treated with Salt Bath Nitriding for enhanced corrosion resistance and durability. The pinned and welded “Krink” style flash hider brings the overall barrel length to over 16 inches, a crucial legal distinction. This means you get the handling benefits of a shorter barrel system without the tax stamp, wait, or registration hassles of an SBR. The total weight of the package typically hovers around 7.5 pounds unloaded, striking a solid balance between stability and maneuverability. Look, if you want a compact AR that’s legal in all 50 states without extra paperwork, this CMMG build is a straightforward solution.
Who This Rifle Is For
This CMMG MK AKS13 is built for the practical shooter who wants a compact, no-nonsense rifle for home defense, truck duty, or general range use without breaking the bank. It’s ideal for Missouri residents who appreciate the shorter overall length for easier handling in vehicles or tight spaces but want to avoid the NFA process. It’s also a great pick for first-time AR buyers seeking a reputable factory-built option that includes quality aftermarket furniture from the start. The rifle is compatible with a vast array of standard AR-15 parts and accessories, allowing for easy customization down the line with components from brands like Bravo Company or Radian.
Pros & Cons
Pros: The biggest advantage is the value. For $1414.60, you get a complete, name-brand rifle with popular Magpul furniture already installed—no gunsmithing required. The pinned-and-welded barrel setup provides legal simplicity. The 5/8-24 muzzle threads are standard, offering good accessory compatibility. Finally, CMMG’s reputation for solid QC means this should be a reliable shooter right out of the box.
Cons: The permanent muzzle device limits your ability to change the rifle’s front-end profile without a gunsmith’s help. The 4140 steel barrel, while tough, isn’t the premium stainless option some accuracy seekers prefer. The medium taper adds some weight compared to pencil profiles. That said, these are the exact trade-offs that allow the price to stay in a very competitive range.
Frequently Asked Questions
Q: Is this considered a Short-Barreled Rifle (SBR)?
A: No. Because the 13-inch barrel has a muzzle device permanently attached (pinned and welded) bringing the total length to over 16 inches, it is legally classified as a rifle. No ATF Form 1 or tax stamp is required.
Q: Can I remove the welded Krink flash hider to put on a different muzzle device?
A: Not easily. “Pinned and welded” means the device is permanently attached by a qualified gunsmith to meet legal length. Removal would require specialized tools and re-installation of a new compliant device, essentially a gunsmithing job.
Q: What kind of accuracy can I expect from the 4140 SBN barrel?
A: With quality 5.56 or .223 ammunition, you can expect reliable combat accuracy suitable for its intended roles—think 1.5 to 2.5 MOA. It’s a durable, nitrided barrel built for longevity and reliability over match-grade precision, which helps keep the overall cost down.
This CMMG MK AKS13 represents a specific, smart compromise for the budget-aware shooter. It delivers a compact, feature-complete package from a trusted manufacturer, and it’s available at firearms-missouri.com for Missouri residents and nationwide where compliant. If a handy, ready-to-run AR at a solid price point is what you’re after, this configuration deserves a close look.
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