HK 10.4" Barrels are not 10.4" long
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Thread: HK 10.4" Barrels are not 10.4" long

  1. #1
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    Default HK 10.4" Barrels are not 10.4" long

    now that does not mean that HK does not call them that and yes they are in fact 10.4" long but not from the breach face

    if you were to remove the barrel extension they measure about 10.4" long from the back of the barrel to the muzzle
    hope this clears up some confusion
    and don't get me started on gasblock seat length
    HK 10.4" Barrels are not 10.4" long-hk-416-barrels.jpg
    these are factory barrels I have refinished not sure what gasblock fits the short ones?

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    Beautiful work as always

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    If I’m not mistaken the 10.4” take a .035” front vent gas block with a 1.6m barrel port. We need confirmation.
    @InshallahTech , can you help here?
    Last edited by RegularGuy461969; 03-23-2019 at 10:36 PM.
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    What length are they from the breach face?

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    Quote Originally Posted by Atz1 View Post
    What length are they from the breach face?
    just a skosh over 10.5"

  7. #6
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    Those barrel's were mine that you refinished for me, along with a gas block and a loose barrel nut that was also part of one of the barrels. Really BEAUTIFUL BEAUTIFUL work (The BEST) in my opinion! I even had a thread years back after the work was done. Here's a pic with the gas block and barrel nut, you also milled the sling loops off and did the same finish for it as well. These heavy barrel's were HK's earlier style where the tapering / chemfer behind the threads is a bit different from the ones most commonly seen out there, where the tapering matches the lite pro barrels. HK also did that same tapering / chamfer behind the threads like on the lite pro's to the later heavy barrels. Also the gas blocks on those earlier heavy barrels used a different cast / forge from the later ones, but the hole size were all the same up until they started using those vented blocks I believe is when things changed.




    Last edited by intz2nu; 03-24-2019 at 03:17 PM.

  8. #7
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    I remember when they came in very cool
    do you have any pictures of the gas blocks?

    Thanks

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    Is it ok if I still call them 10.4” barrels?

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    Quote Originally Posted by RegularGuy461969 View Post
    If I’m not mistaken the 10.4” take a .035” front vent gas block with a 1.6m barrel port. We need confirmation.
    @InshallahTech , can you help here?
    So if I wanted to cut down an MR556 to 10.4'' specs what difference is there if you are installing a 10" vented gas block to non-vented?

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    Quote Originally Posted by nefariousarms View Post
    just a skosh over 10.5"
    Hmmmm....this makes me wonder how GEMTECH measures. I say this because I have a TREK that I want to use but I have refrained because GEMTECH says they will not do warranty work on their suppressors if they are used on BBL lengths under 10.5". I guess I could ask them but I am pretty sure they would side with caution and say it is a no go because 416s are known for the 10.4" measurement. Any thoughts?
    Last edited by MSOGDAWG; 03-26-2019 at 01:14 AM.
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