HK MR556 A4 5.56x45mm 11in Black
The HK MR556 A4 5.56x45mm 11in Black is a 5.56 NATO ar style rifles from Heckler Koch. It is available from 3 vendors at $3339.99 to $3749.
Product Information
Name: HK MR556 A4 5.56x45mm 11in Black
Brand: Heckler Koch
Category: AR Style Rifles
Caliber: 5.56 NATO
Barrel Length: 11"
UPC: 642230269439
SKU: UCBJ1QlAt
Description
The HK MR556 A4 is an AR-pattern rifle chambered in 5.56x45mm with an 11-inch threaded barrel and M-LOK handguard. It ships with a 30-round magazine and comes in a black finish. The 11-inch barrel places this in a short-barreled rifle configuration; transfer requires additional federal paperwork.
Key Specifications
- Brand: HK
- Model: MR556 A4
- Caliber: 5.56x45mm
- Action: Semi Auto
- Capacity: 30 rounds
- Barrel Length: 11 inches
- Color/Finish: Black
Detailed Features
- 11-inch threaded barrel
- M-LOK handguard
- 30-round magazine included
- Black finish throughout
Complete Specifications
| Caliber | 5.56 NATO |
| Model | MR556 A4 |
| Barrel length | 11" |
| Action | Semi Auto |
| Color | Black |
Frequently Asked Questions
What caliber is the HK MR556 A4?
The MR556 A4 is chambered in 5.56x45mm, also compatible with .223 Remington.
Who makes the MR556 A4?
The MR556 A4 is made by HK (Heckler & Koch).
What type of firearm is the HK MR556 A4?
It is a semi-automatic AR-style rifle.
What is the barrel length of the HK MR556 A4?
The barrel is 11 inches long and is threaded.
How many rounds does the HK MR556 A4 hold?
It ships with a 30-round magazine.
Is the HK MR556 A4 barrel threaded?
Yes, the 11-inch barrel is threaded.
Does the HK MR556 A4 have an M-LOK handguard?
Yes, it comes with an M-LOK handguard.
Where can I buy the HK MR556 A4?
Compare current vendor offers on this page.
Customers Say
AI-generated insights derived from customer reviews and discussions on popular gun-enthusiast forums.
Owners of the MR556 A4 in this configuration appreciate the short, maneuverable profile paired with HK's reputation for tight tolerances. The 11-inch barrel and M-LOK handguard draw consistent praise from those who want a compact platform without sacrificing rail space for accessories.
The threaded barrel is a practical plus for suppressor-ready setups, though the added federal paperwork for the short-barreled configuration is a real barrier for some buyers. Those who clear that hurdle tend to be satisfied with the result.
Value relative to the price is the most common debate. The MR556 A4 commands a premium over most domestic AR-pattern options, and opinions split on whether the HK fit-and-finish justifies the cost difference. Trigger feel is functional but not widely praised as a standout.
Where to Buy - 3 Offers Available
Price Range: $3339.99 - $3749
| Vendor | Price | Condition | Link |
|---|---|---|---|
| Guns Com | $3339.99 | New | Buy Now |
| Bereli | $3449 | New | Buy Now |
| Grabagun Com | $3749 | New | Buy Now |
