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Any problems shooting a 7.62x 39 upper on a full auto M16 lower?

Thread in 'Class III & NFA Discussion' started by Trader805, Aug 5, 2018.

  1. Trader805

    Trader805 ODT Junkie! Supporter

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    Anyone shoot this set up? Does it fire full auto OK? Any worry about damaging the lower?

    Inquiring minds want to know
     
  2. Trader805

    Trader805 ODT Junkie! Supporter

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    So does this mean no one has tried it or you just don’t want to share your knowledge?
     
  3. BangBang

    BangBang The Hen that laid the Golden Legos

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    No personal experience here, but I don’t see why you couldn’t as long as the BCG is M16 profile.

    You may need a heavier hammer spring for 7.62x39 primers though.
     
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  4. JDS556762

    JDS556762 Ghost Factory Supporter

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    Shouldn't be any problems assuming the combination of parts works to begin with. Mags, upper, etc. if you’ve got a reliable transferable/post-sample lower and you’ve got a reliable 7.62 upper with an FA bolt and reliable mags (may be the hardest to find) it should run just fine
     
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  5. JDS556762

    JDS556762 Ghost Factory Supporter

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    Not sure if dudes have issues using a RDIAS but you’re using an M16 lower so negligible. Yes you may have to tweak springs and stuff just to run the 7.62 but would be doing the same thing for a semi build with said upper. Normal 7.62x39 tweaks
     
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  6. DADI03

    DADI03 The Hen that laid the Golden Legos

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    The bcg are a little weaker than on a 223. That would be the only problem that I see.
     
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  7. Quiet Riot Firearms

    Quiet Riot Firearms ODT Junkie! Dealer

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    We've never run 762x39 on any of ours, we have AKs for that :hat:

    That said, there should be no lower wear issues I could think of. Hardest thing will be finding enough reliable mags. Just normal 762x39AR problems.
     
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  8. whiskerz

    whiskerz ODT Junkie! Supporter

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    The bolts will fail on either side of the extractor. Does not seem to matter who made the bolt. Buy a spare bolt you will get to use it. A poster on another board I am on posted a picture of 8 failed 7.62x39 bolts. 5 different manufacturers all with the same failure.
     
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  9. Trader805

    Trader805 ODT Junkie! Supporter

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    If I had enough $ to buy both an AK and M16, I wouldn’t care either!
    Will find out if and how well it works one day
     
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  10. Trader805

    Trader805 ODT Junkie! Supporter

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    Thanks for the insight
     
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