HK Heckler & Koch MR556 A4 556 Nato MR 556 16" Barrel 81000827
Description
Heckler & Koch MR556 A4 .223 Remington/5.56 NATO 16.5" Barrel 30+1 Matte Black Adjustable Stock 81000827
Heckler & Koch MR556 A4
The Heckler & Koch MR556 A4 is a precision semi-automatic rifle chambered in .223 Remington/5.56 NATO, built on the AR-platform with a 16.5" cold hammer-forged barrel for exceptional accuracy and durability. It features a proprietary short-stroke gas piston system derived from the HK416, ensuring cleaner operation and reduced recoil compared to direct impingement systems. With a matte black finish and adjustable stock, this rifle combines tactical reliability with sporting versatility.
Delving deeper, the MR556 A4 includes ambidextrous controls for enhanced usability by both right and left-handed shooters, and a free-floating handguard with ample rail space for mounting accessories. The optics-ready design allows for easy integration of sights or scopes, while the 30+1 capacity provides ample firepower for extended sessions. Its advanced engineering minimizes fouling, offering consistent performance in harsh environments.
Ideal for tactical applications, target shooting, and hunting in dynamic settings, the MR556 A4 suits enthusiasts seeking a high-performance rifle with military-grade reliability. Its ergonomic design and customizable features make it perfect for competitive shooting or field use, delivering precision and control for serious shooters.
Specifications
| Specification | Detail |
|---|---|
| Manufacturer | Heckler and Koch |
| Model | MR556 A4 |
| Action | Semi-Automatic |
| Caliber | .223 Remington / 5.56 NATO |
| Barrel Length | 16.5" |
| Overall Length | 33.9" – 37.7" |
| Weight | 8.6 lbs |
| Capacity | 30+1 |
| Sights | None (Optics Ready) |
| Finish | Matte Black |
| Stock | Adjustable |
| Trigger | N/A |
| Magazine | Detachable Magazine |
| UPC | 642230269408 |
| MPN | 81000827 |
| Condition | New |
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Many thanks to GunPrime for their outstanding customer service and their speedy, seamless handling of my recent HK MR556 A4 purchase. I could not be more pleased. GunPrime also had the best out-the-door price. As for the rifle itself, all I can say is "Wow!" I have owned many AR-15 platform rifles over the years (including GA Precision and Kinghts Armament), but HK definitely hits it out-of-the ballpark with the MR556 A4. The fit and finish of the MR556 A4, including every small part, is simply top notch. This is what happens when precision German engineering is combined with the tried & true evolution of the AR-15 platform. I only have 100 rounds through the MR556 A4. The rifle seems to like the 69 grain Sierra MatchKing (Federal Gold Medal) and the 77 grain OTM (Black Hills). YMMV. So far, my best 5-shot group at 100 yards is 0.776" c to c (0.741 true moa) with Black Hills factory ammo (see photo). I cannot emphasize how impressed I am with the HK MR556 A4. And thanks again to GunPrime for making it happen...
I’m very happy with my purchase. It’s a great rifle. My first AR 15 and my second semiautomatic. The rifle shoots very soft because it’s not a super light gun. So far I love everything on it. The only improvement could be the trigger. I will change it out when I have more time behind it.
The service from Gunprime was perfect.
Thanks guys.
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