Looks like they are still making regular old MR556A1s in the new Georgia factory. - Page 2
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Thread: Looks like they are still making regular old MR556A1s in the new Georgia factory.

  1. #11
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    Dumb question here: what is the difference between A3 and A5?

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    Everyone loses their shorts over HK not featuring a chrome lined barrel on the MR series rifles. As discussed previously on HKPro the barrels are sent from Germany already as cold hammer forged and nitrided 'blanks'. Daniel Defense profiles the blanks (removing outer layer of nitride treatment) and adds a parkerized treatment to the exterior. Since the nitrided surface would have been present on the outer and bore surface before profiling and in the bore after, that offers something rather unique. Chrome lining is cheaper than nitrocarburizing (nitriding) and has an inherent impact on accuracy as chrome cannot be applied perfectly. Nitriding has no impact on the bore so it's as sharp as when the mandrel made it. Considering HK uses something in the area of 4340/4350 alloy steel for their barrels, this is already a harder steel than typical chrome moly alloy used in U.S. MILSPEC M4/AR-15 barrels, add to that the nitrocarburizing and you have a superior barrel. While I understand the value of chrome lining, the lack of it is often used to criticize the MR barrels in an area that traditional AR-15 barrels are already deficient.

  3. #13
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    They're not nitrided. How does this rumor persist?

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  5. #14
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    Quote Originally Posted by Augee View Post
    It would make entirely more sense for them to just start building M27s and use the M27 barrel for the MR556 at the Georgia plant than to bring A3/A5 production over here since the U.S. buy in as a whole to them is so low.

    ~Augee
    Agreed That's intelligent.

  6. #15
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    "Regular, old MR556A1's".

    LMFAO....

  7. #16
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    I don’t think there was ever any indication from HK that they would make anything other than the original MR556A1 in the new plant. Just a lot of wishful thinking.

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    Quote Originally Posted by Brahma View Post
    "Regular, old MR556A1's".

    LMFAO....
    ...yeah as in the same old gun with no updates.

    Sent from my Pixel XL using Tapatalk

  9. #18
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    That was 7 minutes of my life wasted.
    Looks like they are making the HK45 there now too.

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    Quote Originally Posted by MasterBlaster View Post
    ...yeah as in the same old gun with no updates.

    Sent from my Pixel XL using Tapatalk
    What "updates" do you need?

  11. #20
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    Quote Originally Posted by Brahma View Post
    What "updates" do you need?
    I'd like a barrel that's chrome lined and not as thick as a coke can to start. Then an adjustable gas block. The Ambi controls from the A5 would be nice too.

    Sent from my Pixel XL using Tapatalk

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