HK MR556 & HK 416 10.4" 556 Upper Conversion Kit Build From Scratch? Feasible? - Page 2
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Thread: HK MR556 & HK 416 10.4" 556 Upper Conversion Kit Build From Scratch? Feasible?

  1. #11
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    Quote Originally Posted by LCSO264 View Post
    yes, you can do this. I have almost all the parts for two complete uppers. I started this/these projects as "something to do," before the current barrels were available on HKParts. And I was in no hurry at all, so I was picking up parts for good prices (less than listed on commercial sites, usually) when they were available. for the parts that never pop up, or the small parts (pins, springs, etc...) I just bought them from HKParts, or allhkparts.. I picked up two stripped uppers for a steal, I'm going to have them cerakoted Ral8000 and OD green (I think), they will ride on my OD green SAN TAN lower. And, I think I'm going to put one of HKParts PDW stocks on it, coupled with a very minimalist upper (at least one of them) for a lightweight PDW or sorts. Not sure what I'll do with the other upper.....

    anyway, like I said, I did this simply as something to do, challenge myself, so I've not been in a big hurry, but I'm sure a motivated individual could turn out a cloned upper built on an HK stripped receiver pretty quickly.
    How about a complete US made 10.4" upper kit or as some would love a true 416C length upper that works! :)
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  2. #12
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    Quote Originally Posted by HK4evr View Post
    How about a complete US made 10.4" upper kit or as some would love a true 416C length upper that works! :)
    now you're just teasing a girl........
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  3. #13
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    Thumbs up You can call it teasing...but they are coming!

    Quote Originally Posted by LCSO264 View Post
    now you're just teasing a girl........
    Already in the works! Barrels as well for those that need just barrels.

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  5. #14
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    Sorry to reanimate a necro thread....I was able to build the complete upper w/out the bcg for right at $1200 sourcing parts from various places. This included a factory new 416 upper receiver and all new piston and op rod with the barrel kit from hkparts.
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  6. #15
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    Quote Originally Posted by jhammon2287 View Post
    Sorry to reanimate a necro thread....I was able to build the complete upper w/out the bcg for right at $1200 sourcing parts from various places. This included a factory new 416 upper receiver and all new piston and op rod with the barrel kit from hkparts.
    Thanks for sharing the final outcome. Congrats!
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  7. #16
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    Quote Originally Posted by jhammon2287 View Post
    Sorry to reanimate a necro thread....I was able to build the complete upper w/out the bcg for right at $1200 sourcing parts from various places. This included a factory new 416 upper receiver and all new piston and op rod with the barrel kit from hkparts.
    So how about BCG can i just buy a new bolt head and use old BC in my 10.4 build upper?

  8. #17
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    Quote Originally Posted by RegularGuy461969 View Post
    Thanks for sharing the final outcome. Congrats!
    I means for 1200 a 10.4 upper without bcg is doable, but the bcg alone cost 500 and more make me think this kit is not a good idea.....

  9. #18
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    Quote Originally Posted by MasonGui View Post
    I means for 1200 a 10.4 upper without bcg is doable, but the bcg alone cost 500 and more make me think this kit is not a good idea.....
    Iím using the bcg from my MR556 and just swapping back and forth. Iím not planning on running full auto so itís not really a big deal. Itís the 416 bcg that doesnít run in the mr upper, mr bcg runs just fine.


    Sent from my iPhone using Tapatalk

  10. #19
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    I guess Iím cheating it up a little bit since Iím running a Geissele handguard on my MR upper and am using the old quad rail on this upper.


    Sent from my iPhone using Tapatalk

  11. #20
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    Quote Originally Posted by jhammon2287 View Post
    I guess I’m cheating it up a little bit since I’m running a Geissele handguard on my MR upper and am using the old quad rail on this upper.


    Sent from my iPhone using Tapatalk
    no you are fine a good 9 inch used Q rail usually run about 200 bucks the only thing i need now is a upper receiver....

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