HK416 / MR556 30-Round Steel Magazine — 5.56mm | Genuine HK (Part #251770S)
HK416 / MR556 30-Round Steel Magazine — 5.56mm | Genuine HK (Part #251770S)
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Factory-built reliability for every HK
Genuine Heckler & Koch steel 30-round magazine designed for HK416 and MR556 rifles. Built in Germany to HK’s exacting standards, this magazine delivers reliable feeding, rugged durability, and precise fitment for OEM performance in service and range rigs.
Key Features
- Genuine HK factory part — Part #251770S
- 5.56×45 NATO, 30-round capacity
- Durable steel construction for long life and rugged use
- Engineered for perfect fit with HK416 / MR556 platforms
- Tested for reliable feeding and consistent function
Add authentic HK quality to your build — Order now while in stock.
Compatible With:
- HK416 / MR556 / MR223
- AR-15
- Any Firearm that uses NATO-Standard 5.56mm Magazines
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Let customers speak for us
from 51 reviewsNothing but the best.
Wow! I'm so glad I was able to grab the last SOCOM profile 14.5 A5 barrel available for now. IMO the fit and the finish is top notch and can't be matched.
I shot nice thight groups out to 100m... so, I can't complain. Looking back, I wish, I could have gotten at least one more barrel for a future A5 project.
Alan Taylor
Dallas, Texas
Very high quality barrel. I would consider this to be as good if not better than the hk made barrels. The chrome lining is excellent and the overall fit and finish is top class. Very smooth shooting would definitely recommend if you are wanting to build a clone or just looking for a high quality cold hammer forged chrome line barrel.
Just got it last Friday so I haven't shot it yet. I purchased the barrel and had Marvin install it on an MR556A4 upper. The work looks really good (no little nicks or anything), the barrel itself is well-made and it's nice seeing a chrome-lined barrel on an HK MR carbine! Would definitely recommend Marvin's work as well as NA for offering us "civvies" a mil-spec barrel. Kudos!
P.S.- Holly answers the phones there and she was very helpful and polite. You all have a solid employee!
Very high quality and definitely adds pressure to the system.
Excellent option for the MR556A4 and 416 clones.
Marvin and his products are top notch. Perfect fitment, excellent quality. These are the best barrels outside fo factory HK that one can buy!
For your barrel nut torquing a must have precision made tool. Excellent machined quality to use on a number of AR , KAC , Centurion Arms or HK variants.
Nicer than other popular and similar tools I have. protect your barrel extension index pin! Get one!